Acer Aspire 5349 began to stop randomly, now can not stay on more than 2 seconds

Hello world!

I use my 5349 aspires for more than 4 years now running Windows 7. A few months ago, he began stopping at random - sometimes after an hour of work, other times - after 10-15 minutes.

It is used mainly for light office work, but given his age, I decided it was due to the accumulation of dust or otherwise overheating due to thermal decomposition paste to the processor and the thermal pads - for the video chip. It is out of warranty, so I disasembled he replaced even if the thermal paste compound and the thermal pad seemed OK. There was no dust important problem as well, in any case seized the opportunity to thoroughly clean.

After assembling and switching on, it ran stable for 3-4 hours which even helped me put upgraded to Windows 10 (32 bit). He rested for a few days due to the holidays here and then when turned on - again closed in about 10 minutes. After that no matter what I do - perform disassembly, check for loose contacts, CMOS battery, laptop battery, etc.-, he could not run for more than a few minutes from the Windows recovery and then stops again. In the last days it even can't stay for more than a few seconds before stopping again, so I can not even get into the BIOS.

Laptop battery is good, because it has always been used as a desktop replacement, in all cases tried with battery and battery off nothing works. The power brick is one that came with it originally, even though it says LITEON instead of ACER. Tried another one with the same voltages and amps for an another ACER laptop - the situation didn't improve or change at all.

Logically, I started reading here and discovered on exactly the same problems with other similar models, so I tried all the suggestions - replaced RAM, HDD, DVD, tried to boot from USB or DVD, tried to remove the build-up of electrostatic charges. I'm very suspicious of the latter, or any electrical problem / might like, because when I completelly demolish the mobile nut, i.e. by removing everything that can be removed and then back - it works for 10-15 minutes before closing.

So, finally, the question is - is there suggestions that I could follow?

The easy solution is to replace the MB in case it would help, or the completely portable, but I hate when I don't understand or diagnose a hardware problem and will make every effort to identify and resolve.

See you soon!

Google the keywords "5349" "mainboard" or "motherboard". Replacements to run $100 inc shipping, some on ebay U.S. and other China.

Jack E/NJ

Tags: Acer Laptops

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