Acer Aspire 4520. When i on the laptop so the get after few seconds . I tried to remove memory, hdd and battery but it seem same problem.
I am not sure whether bios or heat shink problem.
I need clean and used new paste but the problem i do not have techincal guide for acer laptops where i remove parts and use paste.
Is there any chance of getting technical guide to open acer laptop.
What you are looking for is called the "Service Manual" (as opposed to the normal manual). Acer doesn't give out these to non-technicians, but if you do a couple searches on TPB you'll find a very handy torrent with pretty much every manual you could ask for (and it does have the Aspire 4520 manual, I checked).
Without the manual at hand though, I can tell that all you need to do to get to the processor is open up the back and then move the heatsink arm connecting the processor to the fan (I did it recently).