Acer 6930G GPU upgrade mixed success

Hi Gentlemen,
I was able to put a new GPU on my old Acer 6930G.
I found this:
for ASUS M90GN Acer Aspire 5920G nVIDIA GT 240M DDR3 1GB CARD 60-NTSVG1000-A11 | eBay
This is a Nvidia GT 240M from Asus.

Well the laptop boot, and goes to windows normaly (I have a dual boot 8 and 7), but ufortunately it seems that the GPU is not well found by the sytem.
To me it looks like a driver issue, but I was unable to load a driver, also laptopvideo2go special drivers don't work.
To add some mistery, only in windows 7 the card is seen as a "standard VGA" and GPU-Z is able to found some info:

What's going wrong?
Is there something I can do?
Mybe a I need to modify the BIOS on the VGA?

Any suggestion is very well accepted.

 

Have you tried manually installing the driver inf files?

 

I'm a dumb.
I need to use the Hardware ID to find the right driver in laptopvideo2go.
The card now works perfectly.

Anyway I need to work in the dissipator, I found that the copper base do not perfectly touch the GPU.

 

Well, I was able to put a copper shim to perfectly match the GPU and heat sink. Applyed good thermal paste on both side.
After 5 minutes of Furmark the GPU temperature looks stabilized on 75°-76° celsius. I'm very optimistic.


Ufortunately I left the laptop powerd on for about an our, with some simply task running (update of the SO), and when I came back ..surprise!!....vertical colored bar on the screenn...noooooo!!!!

My opinion is the memory fault. The memory chip are soldered on both side of the pcb, this card has 1Gb DDR3, only 4 of them are on the heat sink with new thermal pads, the other 4 on the opposite side probably are now dead due to no cooling.

 

This doesn't look like a memory issue to me. When vRAM fails it usually means spots (most likely white pixels) appearing and disappearing all over the screen. The whole line in one color- it doesn't seem to be vRAM to me.

 

This's the screen.

So is this the GPU?
If I have time, probably I can try a "reflow"..does it make sense?

 

Looks like Game over!!!

 

It looks like the GPU issue but GT 240M doesn't suffer from bumpgate issue so it's not the obvious one- therefore I doubt a re-flow would help.

 

Well, the problem is the LCD panel..need to be replaced.

 

Hi! Is the 240gt better than the 9600m gt GDDR3???

 

Yes GT 240M is faster than 9600M GT. Compare benchmarks and game fps for 9600M GT and GT 240M.

 

hello i saw your probel with the screen, i have something simillar bu in my case the stripers are appering untill the laptok freeze and it starts by him self.
im hinking to buy this gt240m to. Any special model or any special tweek to make it feet?

ati mobile 4650 crash with weird strips. - YouTube

Thanks.