DELL Dimension XPS T800r CMOS Maintenance Mode worries...

Greetings, good people of the world of DELL!

I'm working on a desktop DELL Dimension XPS T800r for a neighbor.

The original complaint: no video

Some things have changed since yesterday when I worked on it, then read on...

Here's what I've done so far in order:

(855) 935-7526 *. Exchanged video from a well-known donor cards.  No change.

2. the DIAGNOSTIC LEDS on the back panel has found.

3 DIAGNOSTIC LIGHTS remain DARK during the start attempt.

4. consultation documentation DELL for LIGHT codes DIAGNOSTIC.

5. the code is: All the DARK - turns on by default.

6. again consulted the DELL documentation to identify what to do:

(a) reinstall microprocessor

(b) remove all the expansion cards

7. After you do both.  No change.

8 using the prior computer knowledge, I pulled ALL of the motherboard except the feeding fittings and connections on the front panel.  I unplugged all connectors power hard drive as well.  I left only the CPU fan connected to the motherboard.  I checked the power supply against DELL standards and all is good.

9. now, knowing the CMOS batteries, I checked the voltage on board.  He was 3.1VDC.  Seems good.  I didn't want to remove it, so in order to make sure it's properly plugged in, I turned the battery making to create a better connection.  That's where things have changed since yesterday...

10 leave the BARE Board, I plugged it in to the power supply.  Silence.  Only the yellow led on the motherboard lit up.

11. I installed the CPU and VIOLA!, LIGHTS flash YELLOW for a second DIAGNOSIS, and both fans turn quickly upward, then will stop altogether.  The yellow led on the motherboard remains on.

12 DELL documentation contains this code to represent: card system is powered,
but the BIOS is not executed.

13. I think turn battery CMOS created a better connection (the computer IS almost 16 years old) giving me a response to market now.

14. I tried to reinstall everything and document what happens after turning the power on.  Nothing changes beyond this point.  LIGHTS DIAGNOSTIC flash YELLOW briefly, and the power supply and fan rotation CPU for a second, then stop.

15 DELL documentation suggests putting the system in MAINTENANCE MODE by the CMOS jumper

This computer is almost 16 years old, and very probably, the owner has not saved the BIOS settings.

This is what is installed, before the Panel:

A CD-ROM drive

An IOMEGA Zip drive

A floppy drive

Now to the question:

Since I have no way to backup or recover the CMOS settings, I hesitate to put the jumper to MAINTENANCE MODE to see if the computer will boot all the way to the top.  I'm not potentially make the computer unusable in maintenance or replacing the battery mode, even though I would replace the battery because of the line due to age.

The DELL documentation:

NOTICE: Pass by the maintenance mode returns all settings in the
Installer system to their default values. Dell highly recommends
that you save or print the current settings before entering in this
mode, so you can fix them when the system is reset to normal
mode.

What do you think will happen if I reset the default BIOS by moving the jumper and replacing the battery?

I will cause a catastrophic failure?

Now, the other side of the coin is that the system is relatively basic, so I have to enter the starting sequences and other isn't a big deal.  I hope...

At worst, I'll have to use a drive caddy to retrieve its data from the hard drive.

Thanks in advance for all your help and support!

Austin Cajiao

In case it helps someone, re-seats maps microprocessor and expansion got the computer fully functional again.  I guess that for a computer in 16 years, the tabs or oxidize some and created resistance which forbade the computer recognition and power.  It works fine now.

-Austin Cajiao

Tags: Dell Desktop

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