Satellite Pro 4290: dead on AC, OK on battery

Hello

I posted this comp.sys.laptops, but without response. I just found this forum. I hope someone here has an idea...

Here's the problem:

My trusty old Satellite Pro 4290 has started to work only intermittently on current alternative - jiggling the power connector would operate. I assumed that 7 years to plug or unplug the adapter had declined the articulation and cracked welding. So, I opened, removed enough course of the joints power connector and the motherboard had cracked on the underside of the motherboard. a quick bit of welding and it was good as new, or so I thought...

However, when he was all wound up, I had * no. * power at all - no green power light, and it was quite dead. I installed a battery and it worked fine - but it's only a very short-term solution since the battery is not recharging because there is no AC!

I have:
* put a voltmeter on the output of the adapter sector; Stable 15.25V.
* put a voltmeter on the side of the motherboard from the power connector; Stable 15.25V.
* put a voltmeter on various points of motherboard on the ground; Stable 15.25V.
* disassembled and re-assembled 3 times to check the spleen connectors etc.
* starts in Windows (XP Pro) and Linux (PCLinuxOS 2007) - two related works on battery only and not charging
* Google for a manual technique/diagram without success

The Council seems to be powered and now, I'm stumped. The laptop don't owe me anything - it is 7 years and its 3 ^ rd ^ battery, 2 ^ nd ^ food and 3 ^ rd ^ hard drive! There is no need to spend a lot of money on, but if it is something simple that I'm missing I would really like to get it working again.

Any ideas?

Thank you.

Andrew Woodward

Hello Andrew

I'm sure that nobody here can give you precise response and accurate instruction how to fix this. It seems that you have very good technical knowledge and you know that you cannot do much without exact schematic manual. Unfortunately, maintenance manuals is not the public act and I'm really skeptical, you'll be able to find it somewhere.

In your case, it may be just power supply electronics issue. What you can do is check the eBay from time to time and try to get the new motherboard.

Tags: Toshiba

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