Fixing an HP DV9000 with No Video (In Richmond)

Keyboard missing a key
Keyboard missing a key
Product ID
Product ID
Dust clogging the vent
Dust clogging the vent
After cleaning
After cleaning
Thermal pad dislocated.
Thermal pad dislocated.
The mark on thermal pad.showing the GPU was covered partially.
The mark on thermal pad.showing the GPU was covered partially.
Reapplied Thermal Compound on CPU and GPU after re-flow.
Reapplied Thermal Compound on CPU and GPU after re-flow.
Replaced thermal pad by copper shim.
Replaced thermal pad by copper shim.
Copper shim on the right spot.
Copper shim on the right spot.
Video is back after reflow.
Video is back after reflow.

The UBC student who sold me the DV6000 motherboard called me to see if I could do reflow for this HP DV9000 and two video cards. I accepted this job because it provided me chance to test re-flow.

Opening up this DV9000 was very much the same with the one that I keep at home for my wife. The only difference was on the fan which had been resigned for easier to open. Checking the motherboard, I found two factors causing the overhead of the GPU. First one was dust clogging the vent in the heat sink which was common after using the laptop for a while. Another one was on the mis-placed thermal pad which covered half of the GPU only. Both factors caused the GPU heat not dissipated effectively.

After I had taken out the motherboard, I did the reflow on 6 Oct 2011, following the last process with higher temperature and longer time on the DV6000 which lasted over 4 weeks as of today.

I had confident that the video would be back and therefore went straight to assemble the DV9000 before testing. When the laptop was back in one piece, I connected my home DV9000 AC adapter to it and tried to boot it up. It gave me 4 beeps without any video. From internet, I found that the 4 beeps was related to memory. I put in a spare memory to it and powered it up again. This time, there was no beeps and the HP logo came up on the LCD screen. I tested the power up several times more. The HP logo came up every time.

It is good to serve again. I further clean up the laptop as for other laptops before sending it back to the UBC student.


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