Dell N5010 display issue after UMA conversion
Hey guys, need help figuring out what's causing the following issue.
I have a dell N5010 which had a bad GPU chip and a UMA conversion was performed.
Initial conversion was done per this video: https://www.youtube.com/watch?v=cq8r920tW64
After conversion, laptop boots and display comes on but once windows starts loading, it becomes all fuzzy/dotted. I initially though it could be a driver issue, so I removed the HDD and booted into BIOS settings. Image was not fuzzy but some letter jitters (like dancing dots at the edge of the letters) was visible. I tried to boot from windows installation disk (without HDD plugged in)but still has same fuzzy image (see attached picture).
I removed the VRAMs and followed the "new conversion guide" (as attached) but image still remains same.
Tests done(with no change):
1. Laptop display is known good
2. Tried known good RAM
3. Tried known good CPU
4. Check proper 25MHz signal on PCH with DSO - (25MHz and stable)
5. Replaced load capacitor for 25MHz crystal
6. Replaced load Resistor for 25MHz crystal
7. Recheck if I did not miss any components removal, shifting and/or adding as per guide
8. Check solder joints of parts shifted/added
9. Check if parts shifted/added have proper values and haven't been damaged
10. Check stable voltage levels from different regulators
11. Check if there was no shorting of solder from removed parts.
Other Observations:
1. Dots do not appear if I open Command Prompt in windows install.
2. Some Dots can be observed around (especially bottom edge) windows logo while OS is loading
3. No dots at all when prompted to choose 32 or 64bits when installing windows
4. When booted into windows (installed on HDD), laptop is very slow and takes a while to register mouse key press and opening folders. Mouse pointer moves smoothly though.
At this point am not sure what else to test and starting to think I may have a bad PCH? Any suggestions is greatly appreciated.
I have a dell N5010 which had a bad GPU chip and a UMA conversion was performed.
Initial conversion was done per this video: https://www.youtube.com/watch?v=cq8r920tW64
After conversion, laptop boots and display comes on but once windows starts loading, it becomes all fuzzy/dotted. I initially though it could be a driver issue, so I removed the HDD and booted into BIOS settings. Image was not fuzzy but some letter jitters (like dancing dots at the edge of the letters) was visible. I tried to boot from windows installation disk (without HDD plugged in)but still has same fuzzy image (see attached picture).
I removed the VRAMs and followed the "new conversion guide" (as attached) but image still remains same.
Tests done(with no change):
1. Laptop display is known good
2. Tried known good RAM
3. Tried known good CPU
4. Check proper 25MHz signal on PCH with DSO - (25MHz and stable)
5. Replaced load capacitor for 25MHz crystal
6. Replaced load Resistor for 25MHz crystal
7. Recheck if I did not miss any components removal, shifting and/or adding as per guide
8. Check solder joints of parts shifted/added
9. Check if parts shifted/added have proper values and haven't been damaged
10. Check stable voltage levels from different regulators
11. Check if there was no shorting of solder from removed parts.
Other Observations:
1. Dots do not appear if I open Command Prompt in windows install.
2. Some Dots can be observed around (especially bottom edge) windows logo while OS is loading
3. No dots at all when prompted to choose 32 or 64bits when installing windows
4. When booted into windows (installed on HDD), laptop is very slow and takes a while to register mouse key press and opening folders. Mouse pointer moves smoothly though.
At this point am not sure what else to test and starting to think I may have a bad PCH? Any suggestions is greatly appreciated.
Attached Files
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