Aspire 6935G replaced motherboard

KangaRufus · Mar 5, 2014

I'm a qualified technician, and have recently been asked to look at an Asopire 6935G which does not charge or power on. I replaced the motherboard with an identical model, but after the replacement the machine still does not charge or power on.
I'm utterly perplexed as to what the problem may be. Have tried 5 different mains adapters, including two universal ones and three Acer official ones. Any suggestions at this point?

unknownofprob · Mar 5, 2014

Power Supply sounds like the nasty problem.

KangaRufus · Mar 5, 2014

Can you link me to a service manual outlining the location of the power supply? I assumed it was part of the motherboard.
Do you mean the mains adapter or an internal component?

unknownofprob · Mar 5, 2014

Power supply meaning a component, it is nothing to do with the motherboard. It is a box at the back top/bottom of inside the case that has lots of wires coming from it. From this issue so far, It has to be the PSU.

KangaRufus · Mar 5, 2014

I can't find any reference to an internal power supply in the 6935G Service Manual:

http://tim.id.au/laptops/acer/aspire%206935g.pdf

unknownofprob · Mar 5, 2014

oh, this is a laptop, my bad (though this was a desktop PC). It has a battery. the battery may be faulty.

Since this is a laptop, you can try this;

Take the battery out and hook up the charger, try to power up that way and see if that works, if it does, it's the battery that' the issue.

KangaRufus · Mar 5, 2014

If the battery was faulty then the machine would still power-on with the mains adapter with the battery removed. It does not.
The replacement motherboard is brand new

unknownofprob · Mar 5, 2014

faulty batteries can cause a PC not to boot.

Try what i said before in previous post.

KangaRufus · Mar 5, 2014

As previously stated, I have already tried powering on the machine with the battery removed.
Thanks for your continued help with this issue

unknownofprob · Mar 5, 2014

is there any loose soldered wires from power connector to the motherboard?

KangaRufus · Mar 5, 2014

No. Everything appears normal.

unknownofprob · Mar 5, 2014

Even right behind the charging connector?

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Aspire 6935G replaced motherboard

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