Thread: HP Laptop no display
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Old 17-09-2009, 23:35   #29
Strzelecki
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Re: HP Laptop no display
If the inverter is now ok (only way to test this is to use it on an identical machine or one that uses the same part no., unless you have the test equipment) then it could be the LCD driver circuitry, which sits inside the lid casing behind the LCD. Other than that, check all the connector as suggested. Disconnect and reconnect them again and make sure the ZIF clips are down securely. The other thing you could try if you feel up to it is to strip the cooler assembly off the cpu and graphics chip, clear off the thermal pads with the proper cleaner and reapply some decent paste and stick everything back together. The DV and ZD series laptops made around the time of yours seem to suffer from poor pads that 'dry up' and so don't conduct heat as well (happens quite often where pads are used and a a few years old) and as those laptops run pretty hot (I have a ZD8079) this improves things if heat is the suspect.
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