I own an Acer Aspire 4820TG with Windows 10 Home installed. The laptop worked just fine until yesterday.
It started freezing during normal desktop operation, i.e. web browser and spreadsheet opened. The only way to exit from the frozen state was a hard shutdown (holding power button down 10 seconds).
The laptop would boot with a working display two more times after being turned on again, but only after waiting >1 hour after the shutdown. However, on both occasions the display would freeze again after a couple of minutes while working in Windows 10.
Since then I observed the following:
- There seems to be no picture on the laptop screen itself or an external monitor via HDMI at all. However, there were occasions where the mouse cursor was visible for one to two seconds, a snow storm picture briefly showed (static black and white), or a sort of melting snow storm picture is displayed (edges slowly turn completely white).
- The Acer boot logo/screen does not display (except for the two occasion mentioned above)
In general, the laptop seems to boot. I can enter the bios with F2 as well, but I don't see anything on the screen (laptop display or external monitor). There seems to be a video signal from the HDMI port, but it drops (the external monitor switches between looking for HDMI signal and a black screen with a signal).
I tried the following already:
- Removed battery
- Drained power by holding power button for >20 seconds after removing battery and power cable
- Removed RAM modules and cycled them through available slots individually and in pairs (either module works in the bottom slot, having a RAM module in top slot only prevents laptop from starting)
As this laptop has switchable graphics, I wonder how it could be that both of them don't work/are damaged? Is this an overheating issue with the GPU?
On another thread I read that taking out the CMOS battery for some minutes might help. Before I embark on disassembling the laptop, I wanted to see whether anyone has any other ideas.