extremely slow windows screen redraw

[Izwan Rahman]

hi guys, long time reader 1st time poster (since I can usually solve my issue by readings back postings)

My friend show me his laptop problem, Used toshiba satellite L500, Fujitsu 500GB HD, dual core Intel 2.2ghz, 2 GB Ram with Ati HD4500 gfx 1 GB dedicated (the Ati card can be removed, it has its own slot).

Used to be OK no problem. Suddenly it wont start the bundled windows 7, even in safe mode (stuck at classpnp.sys). when the normal windows 7 boot animation loads it looks kinda jerky and even stop animating for a few seconds.

So I put in another hard disk and try installing windows 7 (twice, with even another HD), it took almost 2 hour to install and after reboot still cant load windows. <-- AHCI in bios

Now I clone the drive from old xp installation using acronis true image (just to test) and the laptop starts the XP. <-- Compatibility mode in bios

after installing the ati driver, I notice something, the video redraws are too jerky and extremely choppy, like an old pc, maybe 1-5 fps

reboot a few times, still the same.

when opening the task manager it shows "task manager" using up to 50% cpu but at the bottom it show even larger total percentage 70-90%. even when system ide showing 90% the bottom still showing high load.

I've tested the ram using memtest NO problem, Hard disk tested using fujitsu tools NO problem.

Tested install linux Mint 15, OK but took a while. No apparent jerkyness in screen redraws, But the video playback stuck. VLC just shows 1st frame of the video.

Now I might not be an expert but I've been fixing most of my friends and relatives PC for years. This is the first time I saw these kind of problem.

can anyone suggest me whats seems to be the problem?

 

[Xavier Tan Sync]

Try reinstalling the OS and see what happen.

 

[Izwan Rahman]

hi,

thanks for the suggestion.

But as you can see (read) I've already reinstall several times. I also put as much information relevant to my situation, as I already tried so much.

edit*

Also, I might add that booting from Hiren's boot cd to "mini windows xp" failed. stuck at boot logo. I tried another variant with "mini windows 7", boot OK but still jerky redraw adn too slow to use.

I'll try and find same laptop CPU to test <-- can a cpu cause this?

My guess would be the GPU itself thats faulty, can anybody confirm?

http://www.tomshardware.com/answers/id-1722153/windows-bit-unsolvable-problem-extremely-slow-boot.html


this guys' video shows almost exactly my booting problem except that he can actuall boot:

 

[Xavier Tan Sync]

Do you try switching to another gpu and see if the problem persist? And reinstalling the os do a clean install and see

 

[Izwan Rahman]

its a laptop.

I might find a replacement CPU to test but a replacement GPU for laptop are hard to come by.

it look like this: http://www.productwiki.com/upload/images/ati_mobility_radeon_hd_4500.jpg

I appreciate your reply, but please,

anyone? with a decent answer?