MacBook Pro slows down to a halt when plugged via magsafe.

Similar Questions

• MacBook Pro sound stops once the connection when plugged headphones

  On my MacBook Pro, when I connected my jack 3.5 mm (headphones or speakers) and I switched off, the sound stops once I have connection, once again. The speaker icon is gray and I have to remove and reinsert the connector to get her back. Can you help me, please? Thank you.

  Check your settings in the Audio Midi application located in the Utilities folder.

  http://support.Apple.com/kb/TS1574 Troubleshooting for any audio speakers on Macs

  
  

  Trick/Tip: Open GarageBand if installed then, open a program (optional).

  Quit out of the app from GarageBand.

  =====================

  Repair Mac mysteriously mute

  The background on the issue, is that there is a switch small sensor inside the plug headphones. When you insert a headphone jack, the sensor includes what is what and changes the setting of audio output for headphones. If you insert a jack for digital audio output, the unit switches to digital output. When you completely remove the plug, it should read the internal speakers.

  The spirits tell me that there is a very good chance that you recently had something hostage in this port, a set of headphones or a cable leading to powered speakers, for example. When you remove the plug, something in the port have prevented triggering sensor properly. That's why you see Digital Out instead of the internal speakers.

  The solution is to force the sensor to do its job. The safest way to do this is to simply run a plug in and out of the port, a few times. A large part of the time, this takes care of the problem by triggering sensor correctly. If this does not work, there may be dirt in the port. Before moving on to more invasive techniques, get a can of compressed air, plug the small tube which corresponds to the nozzle and the breath to air a few shots in the lane. With a little luck, should dislodge dirt and the port will operate as it should.

  If this does not work, find a swab to foam tip that fits (electronics stores generally carry), dip it in rubbing alcohol and insert gently into the helmet in an attempt to wipe any tenacious dirt. I recommend foam rather than cotton fleece because the variety of cotton could leave the son behind. (This same technique works well with the bad conduct of ports from headphone output on devices such as iOS devices).

  It is possible that dirt has nothing to do with it. On the contrary, it may be that the switch should just a subtle help. If a socket or a buffer does not work, I have heard people resetting successfully with a deft poke with a toothpick.

  http://www.Macworld.com/article/2031146/repairing-the-mysteriously-muted-Mac.htm l

  

• a macbook pro with retina display becomes hot when in use?

  A macbook pro with retina display becomes hot when in use?

  Yes.  All of the skin of the MBP is part of the evacuation of heat, not only the arriere-charniere event.  That's why running the MBP on a hard flat surface is better, so the room air can cool down all surfaces.  He put on a hidden or your knees when running may block exposure to air.

  High intensity running video uses graphics and CPU harder, needing cooling.

• Hello my MacBook Pro model (MacBook Pro (15 inch, early 2011 am Dubai bought the Sryalsh C02FD2CPDF8 number and I am in Iran that MacBook Pro not enter the device screen when I turned on the pink vertical lines can be seen, the problem is restless))

  Hello my MacBook Pro model (MacBook Pro (15 inch, early 2011 am Dubai bought the Sryalsh C02FD2CPDF8 number and I am in Iran that MacBook Pro not enter the device screen when I turned on the pink vertical lines can be seen, the problem is agitated and it is not difficult to work with him because I like and what I should I do?))

  Serial number C02FD2CPDF8V

• I was in the middle of an update when my Macbook Pro closing in on me, and when he turned back, he wouldn't let log me into my account. Why is this happening?

  I was in the middle of an update when my Macbook Pro closing in on me, and when he turned back, he wouldn't let log me into my account. I know that my password and everything, but this isn't just me connect. I have to restart the laptop? If so is there a way I can save all my documents? Please help as soon as POSSIBLE.

  Was it a software update from apple? When an apple update requires a restart, it may take a little time so that it starts. If it do not, you can try a reboot. What year MBP and operating system you are running. If everything fails and you have the recovery partition. You can start on it and do a reinstall. This should not delete any personal files.

• MacBook Pro has started to randomly stop when it is on battery since the upgrade to El Capitan

  I have a MacBook Pro (15 inch, early 2011) which works very well on the Mountain Lion for a long time. I finally got round to upgrading to El Capitan last week: directly to 10.11.6. A few days later he just powered down without warning while I was working. He was so very well for a few days, but then made several times in the last 48 hours.

  I am moderately sure it happens only when it is on battery (it did not in the past hours 8 while that plugged). Whenever it happens, that there is no warning and the Mac then fine restarts (manually) - Although the clock resets always in 1970 until he can contact an NTP server. One of the curious side effects is that my PostScript fonts were blank on the screen in Excel for a few reboots yesterday but then OK once again!

  No hardware has changed. Major software change is only El Capitan and possibly an iStat Menus update.

  I have reset PRAM and SMC. I ran the short AHT. I disassembled the machine and clean the fans. they were OK, but the problem seems to occur when the Mac is hot.

  Spotlight and Time Machine sometimes seemed to be struggling for the upgrade, and I also saw rpcsvchost with 100% of a core for a while. The machine feels sometimes slow - but for the last 8 hours, it was very good. The only model that I put in place, is that it seems to occur only on battery; It's even happened then that the Dock (etc.) were loading after logging in after an unexpected shutdown.

  The other thing common is in the newspapers every time:

  Cause of previous stop:-128

  I scanned a number of related posts to aspects of it, but do not look at who blames El Capitan rather than material. Yet, many people reported this kind of problem after the upgrade... Coincidence?

  Any ideas?

  Thank you.

  Cause of previous stop:-128

  A negative stop code generally indicates a hardware failure. Have the Apple to assess your Mac. The fix may be as simple as a spare battery.

  Start here: contact support

• MacBook Pro slow and stop, memory or HARD drive or motherboard?

  These last few months my Macbook Pro medio 2012 begins to slow down. I was thinking of a resettlement but has not had the time yet.

  Last month, he really slow started to freeze and stops instantly. It reboots and then I get a gray screen saying with the icon (a card with a questionmark in there) that it cannot find the boot disk drive. I close it again with the button and restart, then it starts normally. This would have me believe it has something to do with my HARD drive or the motherboard, but then again I'm not a tech guy so I guess just really. Then I got the idea to do a test of material, with this error as a result: 4MEM/62/40000000: 0x81d97590

  After searching the Web, it would mean that my memory would be bad/broken. I read in another post to download an app called 'Remember' which tests your RAM. I tried yesterday and it worked fine, nothing was wrong. But today I did once again when my Macbook was slow functioning again and went to do some other stuff. When I came back my Macbook has a black screen, a Word to insert a boot disk. I just stopped and restarted again and started normally. It is a little slow to clear grey screen with the apple logo.

  So my question is, does anyone know where the shoe pinches, RAM, HARD drive or the motherboard? Will also contribute to a reinstall? Can I check if my RAM is always placed properly or is maybe dirty? I use an application called memory monitor for clean working memory from time to time. I'm updating to El captain, wanted to do it instantly when I want to do a clean install on my mac, but I think I'll wait with that I know where the problem lies.

  Really hope someone can help me!

  Kind regards

  Mike

  This was the report on closing down:

  accident report

  Anonymous UUID: 2DD0FAD1-4D38-B739-F019-9F395B5DB6AD

  Sam Nov 28 17:54:55 2015

  Panic report *.

  panic (cpu 0 0xffffff80037c127e appellant): "launchd died\nState to the last Exception:\n\n"@/SourceCache/xnu/xnu-2782.50.1/bsd/kern/kern_exit.c:363.

  News of the UUID:

  uuid = 0x7fff61d7e000

  uuid = 0x108fa1000

  uuid = 0x108ff1000<4396b358-725e-3ec0-bcbb-e4bf75fe1fb0>

  RAX: 0 X 0000000002000001, RBX: 0000000000000006 RCX 0 X: 0X000000010A2800E8 RDX: 0 X 0000000000000000

  RER: 0X000000010A2800E8, RBP: 0X000000010A280190, IHR: 0X000000010A27FF40, RDI: 0 X 0000000000000001

  R8: 0 X 0000000000000000, R9: 0X0000000108FE09F0, R10: 0X00007FFF91399B02 R11: 0 X 0000000000000206

  A12: 0 X 0000000000000000 R13: 0X00007FFF9688D7E0, R14: 0X000000010A2805D0 R15: 0X000000010A280790

  RFL: 0 X 0000000000000206, RIP: 0X00007FFF9139795A, CS: 0 X 0000000000000007, SS: 0 X 0000000000000023

  Wire 0xffffff8021e8a970

  0x00007fff9768fdab

  0x00007fff9768fec8

  0x00007fff976893b4

  0x00007fff9c109a6c

  0x0000000108fcf907

  0x00007fff96a7de73

  0x00007fff96a80dc7

  0x00007fff96a80a1c

  0x00007fff942c5a9d

  0x00007fff942c33dd

  0 x 0000000000000000

  Wire 0xffffff80220c1798

  0x0000000108fb8c91

  0x00007fff96a7de73

  0x00007fff96a815cd

  0x00007fff96a81030

  0x00007fff96a80bef

  0x00007fff96a80a1c

  0x00007fff942c5a9d

  0x00007fff942c33dd

  0 x 0000000000000000

  Wire 0xffffff8021e8a000

  0x00007fff96a8226e

  0 x 0000000000000000

  Wire 0xffffff8021fb15c0

  0x00007fff96a81925

  0 x 0000000000000000

  Wire 0xffffff803a4bd000

  0x00007fff96a8a4e6

  0x00007fff96a8293b

  0x00007fff96a813bc

  0x00007fff96a81030

  0x00007fff96a80bef

  0x00007fff96a821a3

  0x00007fff942c605a

  0x00007fff942c5fd7

  0x00007fff942c33ed

  0 x 0000000000000000

  Wire 0xffffff8037edb2e0

  0x00007fff8fbeaf1a

  0 x 0000000000000001

  0x00007fff61d8a475

  0x00007fff907537b5

  0x00007fff9765e648

  0x00007fff9688d7e0

  0x00007fff9688fddf

  0x00007fff96a7de73

  0x00007fff96a7e8ca

  0x00007fff9688e0a7

  0x0000000108fcc393

  0x00007fff96a7de73

  0x00007fff96a815cd

  0x00007fff96a81030

  0x00007fff96a813bc

  0x00007fff96a81030

  0x00007fff96a80bef

  0x00007fff96a80a1c

  0x00007fff942c5a9d

  0x00007fff942c33dd

  0 x 0000000000000000

  Wire 0xffffff8025fd2e28

  0x00007fff942c33dd

  0 x 0000000000000000

  Mac OS version: 14F1021

  Kernel version: kernel in Version 14.5.0 Darwin: kills Sep 1 21:23:09 PDT 2015; root:XNU-2782.50.1~1/RELEASE_X86_64

  Kernel UUID: 06D286E3-A8A1-3BE7-A7EB-EAC6E0C69758

  Name of system model: MacBookPro9, 1 (Mac-4B7AC7E43945597E)

  an application called 'Remember' which tests your RAM. I tried yesterday and it worked fine, nothing was wrong.

  This is not the right way to think about memory problems. When the test of the RAM ALL said that there is a problem, it's the truth. RAM problems are very difficult to isolate, and a diagnostic runs, but can't find the problem, if NOT "nothing was wrong" which is "he cannot find the problem immediately."

  This isn't a mystery. DIMM RAM, not another thing is more likely to fail. Then you could try Rember running all night, you could try to remove one of your DIMMs and see if chess stops, you can try to get a new DIMM and see if they work better.

• MacBook Pro shut down unexpectedly

  My Macbook Pro (with the retina, end 2013) stopped unexpectedly. Running OS X Yosemite 10.10.5. It's never happened before, but did it 3 times today already. Not on again unless I connect it to a power source even if it was 60-80% charged each time that its judgment down. It doesn't give me an error when I turn it back on, the only thing substantially different is that it defines my date and clock in one year. I made diagnostics, but it does not found error!

  I would like more information: can put you a list of Etrecheck here please: download from etrecheck.com

• Two Macbook Pro, both does not start up, when I press the power button, I hear two disc bit Caryl, I see little light on the front on the displasy release button, black screen, no edge

  It was weird because I've NEVER had two computers have the same problem before. They are the model 2008 2.2 Ghz Core 2 Duo, 6 g of RAM, models of 128 GB of hard drive, the two Yosemite running, both had new hard drives, cables, batteries and RAM installed OWC (Apple approved reseller) and I use Macs for at least 20 years. In about a week, one just blacked out while sitting on my desk doing nothing, the other does the same on a week later. When I press the power button, I hear the drive hard hum twice, then all I get is the little light on the screen release button, that's all. Black screen. fails, nothing. I can press the power button and it will fit off the coast. Is it possible that some of them have infected somehow, or possibly send me the malware that has infected my system? I would not normally only, but for all of them to go down to one right after the other with the same problem just made me think, it must be the same cause, but what?  I had been in a war of fire recently with very ugly people, and I've never seen two Macs have the same exact problem in a row like that right.

  I took readers on the Macbook Pro, put them on sleds and threw them in my PowerMac, and both seemed fine, no problem, started well upward, ran utility disk on them, no problem, so I started to the checklist. Reset the PRAM. Nothing. SHIFT key at startup. Nothing. D at the start. Nothing. V order at startup. nothing. I wouldn't mind even their evisceration and making a portable useful with the parts of the two, but until I find out what the problem is, what can I do?

  If anyone has any suggestions, I would really appreciate it, I've supported every button I can think at the start, tried an inch USB key, boot and disk, this is the same Caryl bit both of the car, no chime, black screen, that's all.

  Thanks for your help.

  Damicon999 wrote:

  Is \Is possible for someone they have infected somehow, or possibly send me the malware that has infected my system?

  no chime, black screen, that's all.

  I don't think they are infected.

  The startup chime indicates that the Mac has made the initial diagnostic tests and there is no hardware problems or fundamental software.

  No edge in your case is a problem.  I think it's the luck of the draw to have 2 failures.

  In or out of warranty you can get for free a 'Apple Service Diagnostics' OTC test

  Genius of booking http://www.apple.com/retail/geniusbar/

  Online https://getsupport.apple.com/GetproductgroupList.action

  check the warranty https://selfsolve.apple.com/agreementWarrantyDynamic.do

• I need help on my macbook pro i5 13inch mid 2012 model when I open all black screen

  I stopped just my macbook pro, when I open all the black screen but it has power... can I bring it to apple store to fix. How will they charge?

  The cost will be dependent on what may be wrong.  It could be the GPU or the screen is who is several hundred dollars.  It could be the connection of the screen, which will be very little costly to repair or even for free if only the connection is loose.

  Foe a final quote, bring the product to an Apple store genius bar.

  Ciao.

• MacBook Pro retina 15 inch heats up when it is connected to the external monitor

  Hello

  My problem: When I connect my monitor (LG IPS277L) temperature of my Macbook Pro starts to heat upward. This problem often occurs when I use Facetime.

  I found it really strange because I should have a pretty good Macbook Pro for this.

  MacBook Pro (15 inch, retina, medio 2015)

  Processor: 2.5 GHz Intel Core i7

  Memory: 16 GB 1600 MHz DDR3

  Graphics card: Iris Pro 1536 MB Intel / AMD Radeon R9 M370X

  El Captain 10.11.6 OSX

  I hope that someone recognizes this problem and wants to share their solution.

  When you connect to an external monitor, you use the AMD Chip for graphics (without the external screen, most of the software needs only the graphics engine Intel).  It attracts more power and therefore heats up.  All MacBook Pro for this to some extent.  This should be considered normal.  If the computer is actually overheating, it will stop.

• Why won't my Macbook Pro start in recovery mode even when I press Cmd and R

  Why don't my Macbook Pro starts in mode of recovery even when I restart and press Cmd and R or also I tried Cmd Alt and R

  Is the EXACT year/model of your MBP a mid-2009 as the current OSX?

  Depending on the circumstances, you may need to use the drives original installation to help you MBP rerun.

  Ciao.

• MacBook Pro slow after connecting

  I can't explain it well enough, but let's try...

  I connect to my username very well. But after the signing, I get the spinning ball. Logging in can take a few seconds, or as long a minute before the desktop appears. It is random when the system decides to catch up and to really start to work. Sometimes it will happen quick office and then I get the spinning ball.

  I checked / things:

  • Made new user account - same results
  • Bought the new show always the same hard - one SSD drive.
    • A new OS settled with new hard drive as well
  • Considered the start to each user account - there is no.
  • has started with disabled WiFi.

  I think that's about it. Just curious if anyone has had similar problems. Basically, the time it takes to have a normal operation of the computer is considerably more time that it has been in the past. It's almost to the point of being unusable because it's so frustrating just to connect and wait.

  Thanks for any help!

  Data sheet:

  MacBook Pro (13-inch, mid 2010)

  El Captain 10.11.5

  New HD - OWC Mercury Electra 3G SSD

  You can try AHT http://support.apple.com/kb/HT1509 not definitive by any means, but can be useful if there is an error code

  In or out of warranty you can get for free a 'Apple Service Diagnostics' OTC test

  Genius of booking http://www.apple.com/retail/geniusbar/

  Online https://getsupport.apple.com/GetproductgroupList.action

  check the warranty https://selfsolve.apple.com/agreementWarrantyDynamic.do

• MacBook Pro slow since El Capitan upgrade

  Hello - My machine is several seconds or laggy since update to El Capitan.  I have done first aid in the new disk utility and restarted several times with a few improvements, but things are still running slower than on Yosemite.  Any ideas?  Here is my EtreCheck:

  EtreCheck version: 2.7.2 (232)

  Report generated 2016-01-15 23:14:26

  Download http://etrecheck.com EtreCheck

  Time 01:27

  Performance: Excellent

  Click the [Support] links to help with non-Apple products.

  Click the [details] links for more information on this line.

  Click the [Scan for adware] links help to remove the adware.

  Problem: The computer is too slow

  Hardware information: ⓘ

  MacBook Pro (15-inch, mid-2012)

  [Technical details] - [User Guide] - [Warranty & Service]

  MacBook Pro - model: MacBookPro9, 1

  1 2.6 GHz Intel Core i7 CPU: 4 strands

  8 GB of RAM expandable - [Instructions]

  BANK 0/DIMM0

  OK 4 GB DDR3 1600 MHz

  BANK 1/DIMM0

  OK 4 GB DDR3 1600 MHz

  Bluetooth: Good - transfer/Airdrop2 taken in charge

  Wireless: en1: 802.11 a/b/g/n

  Battery: Health = Normal - Cycle count = 1487 - SN = D86225200GKDGDLBQ

  Video information: ⓘ

  Graphics Intel HD 4000

  Color LCD 1680 x 1050

  NVIDIA GeForce GT 650M - VRAM: 1024 MB

  System software: ⓘ

  OS X El Capitan 10.11.2 15 c (50) - since startup time: less than an hour

  Disk information: ⓘ

  SM128E SSD APPLE disk0: (121,33 GB) (Solid State - TRIM: Yes)

  EFI (disk0s1) : 210 MB

  HD (disk0s3) [recovery] recovery: 650 MB

  MacBook Pro (disk1) /: 120,10 (Go 24,28 free)

  Storage of carrots: disk0s2 120.47 GB Online

  MATSHITADVD-R UJ - 8À8)

  USB information: ⓘ

  Apple Inc. FaceTime HD camera (built-in)

  Apple Inc. Apple keyboard / Trackpad

  Computer, Inc. Apple IR receiver.

  Apple Inc. BRCM20702 hub.

  Apple Inc. Bluetooth USB host controller.

  Information crush: ⓘ

  Apple Inc. Thunderbolt_bus.

  Goalkeeper: ⓘ

  Mac App Store and identified developers

  Adware: ⓘ

  Adware infection possible. [Search the adware]

  Kernel Extensions: ⓘ

  / System/Library/Extensions

  com.Focusrite.driver.usb2audio [no charge] (1.5-10.6 SDK) [Support]

  Launch officers: ⓘ

  [ongoing] com.brother.LOGINserver.plist [Support]

  ✓ com.oracle.java.Java - Updater.plist [loading] [Support]

  Launch of the demons: ⓘ

  ✓ com.adobe.fpsaud.plist [loading] [Support]

  ✓ com.barebones.authd.plist [loading] [Support]

  ✓ com.bombich.ccc.plist [loading] [Support]

  ✓ com.bombich.ccchelper.plist [loading] [Support]

  ✓ [ongoing] com.cleverfiles.cfbackd.plist [Support]

  ✓ com.malwarebytes.MBAMHelperTool.plist [loading] [Support]

  ✓ com.oracle.java.Helper - Tool.plist [loading] [Support]

  org.tcpdump.chmod_bpf.plist [loading] [Support]

  Launch User Agents: ⓘ

  ✓ com.google.keystone.agent.plist [loading] [Support]

  [ongoing] org.XBMC.helper.plist [Support]

  User login items: ⓘ

  iTunesHelper Application (/ Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)

  Find another shortcut to file Application (/ Applications/Utilities/find all File.app/Contents/Library/LoginItems/Find all Hotkey.app file)

  Other applications: ⓘ

  [ongoing] com.brother.utility.NETserver.352

  [ongoing] com.brother.utility.USBserver.97632

  [ongoing] com.etresoft.EtreCheck.12512

  [ongoing] org.Mozilla.Firefox.53472

  [ongoing] org.Tempel.findanyfile.hotkey.74592

  Internet Plug-ins: ⓘ

  FlashPlayer - 10.6: Version: 20.0.0.267 - 10.6 SDK [Support]

  QuickTime Plugin: Version: 7.7.3

  Flash Player: Version: 20.0.0.267 - 10.6 SDK [Support]

  Default browser: Version: 601 - SDK 10.11

  PepperFlashPlayer: Version: 20.0.0.267 - 10.6 SDK [Support]

  Silverlight: Version: 5.1.40728.0 - 10.6 SDK [Support]

  JavaAppletPlugin: Version: version check Java 8 66 17 construction update

  The Safari Extensions: ⓘ

  FastestTube

  ClickToPlugin

  Audio plug-ins: ⓘ

  DVCPROHDAudio: Version: 1.3.2

  3rd party preference panes: ⓘ

  Flash Player [Support]

  Java [Support]

  Time Machine: ⓘ

  Skip system files: No.

  Mobile backups: OFF

  Automatic backup: NON - automatic backup disabled

  Volumes to back up:

  MacBook Pro: Disc size: 120,10 GB disc used: 95,82 GB

  Destinations:

  MBP-backup [Local]

  Total size: 142,21 GB

  Total number of backups: 5

  An older backup: 29/04/14, 15:43

  Last backup: 04/12/14, 12:09 AM

  Backup disk size: too small

  Backup size 142,21 GB< (disk="" used="" 95.82="" gb="" x="">

  Top of page process CPU: ⓘ

  Firefox 8%

  6% WindowServer

  4% kernel_task

  3% hidd

  1% fontd

  Top of the process of memory: ⓘ

  675 MB kernel_task

  500 MB firefox

  Ocspd 238 MB

  ICDD 164 MB

  156MO WindowServer

  Information about virtual memory: ⓘ

  1.61 GB of free RAM

  6.38 GB used RAM (1.76 GB being cached)

  Used Swap 0 B

  Diagnostic information: ⓘ

  January 15, 2016, 23:04:59 self-test - spent

  January 15, 2016, 21:34:02 /Library/Logs/DiagnosticReports/Mail_2016-01-15-213402_[redacted].hang

  /Applications/mail.app/Contents/MacOS/mail

  January 15, 2016, 21:09:17 ~/Library/Logs/DiagnosticReports/pkd_2016-01-15-210917_[redacted].crash

  / usr/libexec/PKD

  Try a boot course and see there is a difference:

  https://support.Apple.com/en-us/HT201262

  Thought that it reads 'normal', in 1487 cycles a battery is warranted.  Stacks of old, used often expand and can damage a MBP.

  Ciao.

• Video games slow down the computer even when closed?

  Recently, I replaced the NVIDIA GeForce 6150 SE with a 8400 GS PCI Express so that I can play Call of Duty 4, Fallout 3, Microsoft Flight Simulator X, etc. After installation of the new equipment, several problems came. I have a 32-bit of Windows Vista Home Premium.

  1. the "Windows experience index" could not evaluate the 8400 GS.
  2. Windows could not find the driver for the 8400 GS software automatically, then I found myself from www.nvidia.com.
  3. Although games played much more quickly after any where between 5 and 30 minutes of games, the computer goes REALLY slow. Yet once I close the games via the Task Manager, the computer continues to accuse. Icons highlight more slowly, for example. It remains for 5 to 10 minutes before returning to its original state.

  It could have been a problem plant material so I reinstalled the driver/3 times already.
  I have cleaned the registry of the computer, defragmented it and the two drives C and D.
  Problem persists.

  Help, please? Otherwise I'm going to get a new video card that is not too good.

  Hi decapen10,

  Looks like you're having overheating problems. Everything works fine until the internal temperature reaches a certain point, then the system slows down to protect the processor failure. When you leave the high demands of the games that you play, the card can cool down a bit and things pick back up. Take a look at your map and see if there's a fan built in. If this is not the case, try to join one. If so, try to take the case out of your pc to see what happens. If it works fine, then you must install some additional cooling in your case to dissipate heat coming builing. The other scenario is that you could have a defective 8400 GS. You could try to Exchange if it is still under warranty.

  Here is a link to a site discussing these issues:

  http://h30434.www3.HP.com/PSG/board/message?board.ID=monitor&thread.ID=243

  I hope this helps. Dave D
  Microsoft Answers Support Engineer
  Visit our Microsoft answers feedback Forum and let us know what you think.