Artifacts on the screen!

I have just recieved my Acer Aspire 5024 from warrany service and I after 5 minutes off iwork the computer screen gets wierd. Many rendering artifacts, patters start to appear on the screen. After a around 30 seconds Windows is not responding and I get the blue dead screen and instant restart.

Looks like I have to take it to the service again...

But I would like to know wht exactly is worng? Video card?

 

I would Guess your GPU is over heating and causing artefact on the screen. Might wanna confirm that with one of the gurus hanging around here though!

Otto.

 

Yep, can't imagine what else it could be. The GPU is either defective or overheating (the latter is most likely)

You might try to see what error you get on the blue screen, but you may not learn anything useful from that.

 

Yeah I have heard that before. Overclocked/overheated GPU memory chips can cause this. But there is NO overclock. This happens even on battery when both CPU and GPU is underclocked.

Very wierd, very wierd...

 

It dissapears too quickly. Is there any way how to delay it?

 

Call custumer support. Tell them they need to give you a new computer XD

 

Stupid question, but what does artifacting look like exactly?

 

Different patterns, squares ands so on

I will post a photo later.

 

Overclocking isn't required to overheat hardware. It might just have a badly fitted heatsink, or maybe you just got unlucky and your particular sample runs hotter than they usually do. Or maybe you're using it in a slightly hotter weather than they can handle, or....

If the heatsink isn't fitted properly, there'll be small air bubbles, and they are *really* good insulation, meaning the GPU will overheat no matter how much you underclock it.

Otherwise, it could be that the GPU is simply defective, at any temperature.

System Properties->Advanced->Startup & Recovery-> uncheck the 'Automatically restart' checkbox.

 

I just cant believe its heat. When its plugged in AC artifacts start to appear 30 - 60 seconds after boot proess starts. If I am using battery (and underclocked video) I can use theo compter 10 minutes or even longer. After that the artifacts ar back but in more lighter form. On battery and lowered GPU freqvencys they dont even cause restart.

And what about fresh GPU drivers? Logically thinking they wont change anything... but atleast I can try.

 

Why couldn't that be heat? When running on AC, it's faster and produces more heat, so the problem occurs earlier. Keep in mind it could be a mix too. Your GPU might be a bit unstable, so even slightly higher than usual temperatures kill it.

 

My integrated M10 died on my last notebook. Instant alphanumeric characters on boot screen, Windoz and external monitor. I had no other option than to replace motherboard, after trying to re-image drive.

Is your GPU soldered or socketed? Can you get to the GPU to see if its running hot or use utility of choice to report temps before failure?

Is your GPU fan running or does not run? If it was just serviced the fan connector may be disconnected?

 

I just cant hear the GPU fan. I guess its passively cooled. Also at the moment I have no utility to chech the GPU freqvencys and temp. Some time ago I installed ATiTool but it did not recognise my card.

Whitch utility should I download to see GPU core/mem freq + temperature?

 

Can't ATI's driver do it? I know NVidia's shows me the temp and everything.

 

I just installed a newer ATi Tool version and it detected the core/mem freq. On battery memory was set to 100 Mhz and there were very little artifacts. When I increased core freqnecy from ~150 to 260 or above everything was still OK. Until I tried the "Check max memory" feature. It increased mem clock rapidly and terrible artifacts appeared first in the 3D animation and then in the whole screen causing the blue system error.

So - memory is unstable even on 100 Mhz (little artifacts) but it should work well even on 350 Mhz (stock AC freq). At this speed deadly artifacts appear immediately causing bsod after 10 - 15 seconds.

 

What happened when you called your service center with the fresh new video problem? There is normally an 90 day warranty and you could ask about the final check out before being sent back to you?

 

I will simply take it back to warranty service. The video card in board they just installed is defective. It cant handle memory freq higher than 100 Mhz but it is made to work with 300 Mhz and higher.

 

Afer short period of use and several blue-screens my acer broke down complately. It says "No operatiing system found".