|(Pic 1) bare motherboard on bench|
This tells me two things. One the GPU is OK but the video memory is defective or not addressing all the lines of the GPU properly.
Picture 2 with the stripes definitely tells me that it is the video memory! Now attempting to repair this issue is similar to the reflow heat process used on an earlier DV series video issue
Picture 3 shows the second screen attempting to boot from network adapter but the characters are incorrect and pixelated.
Picture 4 shows the video daughterboard.
|(Pic 2) Lines on external display|
|(Pic 3) Post screen attempting to boot to network |
(no hardrive installed)
The choices are:
Attempt to downgrade the video memory from
512mb to 256mb by removing the memory from the
bottom side of the daughterboard. If the defective ram is in the second bank of ram the problem would be solved. If not the card will have to be replaced. And cost becomes an issue since most of the cards on eBay are overpriced. Even noticed a
dead video card for this model selling for $149~!!!
|(Pic 4) The culprit nVidia daughterboard|
Replace the daughterboard to have a working laptop. So this week I will have to do some selecting from the various items available.
Note: Video shown on external monitor, but not on laptop LCD.
Updates to follow.
Preparing to reball the video card since the card itself is hard to find, and expensive. A real time consuming test process because the laptop has to be partially assembled to test each repair/reball attempt.
Reballing is not an option. Since the solder balls are smaller than equipment available.