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Robert Ehinger
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Sony Vaio Laptop Problem

I recently repaired a Sony Vaio Laptop. I added RAM, installed a new battery and purchased a new power supply. The problem the owner of this laptop was having was that it wouldn't boot. After I performed the above repairs and upgrades I kept the laptop for several days, ran it on the battery until the battery ran down, recharged the battery, ran the system for hours on end, rebooted it several time, shut it down periodically, closed the lid to put it in standby, brought it out of standby etc. The only time I had a problem was when I tried to run it from just the power supply and I plugged in the old one. Once I plugged in the new power supply it fired up again. The problem is, I returned it to the owner and she took it home and now it won't boot. The power indicator and battery light flash and go off but the computer does not boot. Any ideas what the problem could be? Any suggestions as to what I should be looking at to solve this problem.

Thank you!!

Robert
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Robert Retzer

8/22/2022 - Mon
ASKER CERTIFIED SOLUTION
ce1000

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Timothy McCartney

If the battery is completely dead, it's possible that it draws too much power initially and trips a 'breaker' in the power supply. I recommend that maybe they try plugging the power adapter into a different outlet, then plugging in the adapter to the laptop to see if the same issue occurs.

Also, they may try to power it from the adapter alone (no battery installed) to see if that makes any difference.

Unfortunately I may be inclined to believe the issue is with the power board as suggested by ce1000. It's not uncommon for bad/faulty adapters to cause problems on the board as well.
David-Howard

Robert,
I've seen the same behaviour when the battery was not properly seated. I've also had issues with clients plugging the laptop into outlets or power strips that had problems. Those were easy enough to troubleshoot as I would ask them to power the laptop from a different wall socket (not in the same room as where the problem occured). If it's working fine in your shop for days on end the only thing that is changing is location (i.e. different power sources and physical movement of the laptop (lose battery).
Robert Ehinger

ASKER
OK, some clarification - I wasn't trying to say the battery is dead just that I ran the computer on battery until the battery was drained as part of the testing process. I got over six hours life from the battery. I then recharged the battery with no problem, ran on battery or AC power with no issues until the owner took it home. It is a new battery that functions as it should.
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William Peck
Robert Retzer

did your customer bring back the laptop to you or did she just call you and say the laptop is not working. If you are getting the same results as the customer when you are testing it then you are probably looking at replacing the power board.
Robert Ehinger

ASKER
She called and told me of the problem. I will be going to her house this evening to see if I can recreate the problem. I did not have the problem she is describing when I had the computer.
Robert Ehinger

ASKER
I replaced the power board and the first time I tried to boot the computer it started right up. I shut it down and tried to boot it again and the same problem arose. I did notice that the fan is not running and I will replace that as well to see if that helps.
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SOLUTION
Robert Retzer

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Robert Ehinger

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OK, I replaced the fan and the power board. I reassembled everything except putting the bottom casing back on and the laptop booted into Windows. I then replaced the bottom cover and it wouldn't boot. I took the bottom off again and it booted. I then put the cover back on without any screws and it booted. I installed one screw at a time and it booted after each one. I have returned it to its owner and am awaiting feedback from her.
Robert Retzer

Hmm, maybe you were tightening the screws too tightly. If the screws especially in the fan area are tightened too much it may put too much pressure on the fan housing preventing the fan from turning. This may happen on some models of laptops.