Picked up this 17" laptop cheap off eBay as a project. I've done about all I can do on it, and have pretty much hit a wall. Thought I'd post here and see if anyone has any ideas.
Symptoms are - it's dead. No sign of power anywhere on the unit. Battery claims to have a charge via the built in gauge, but I doubt it works... it also gives me nothing to work with.
Power jack has been ruled out - I've been working with it using soldered in wires running to a compatible power brick.
Here's what I have for measurements so far:
PQ51 (an AO4914): pins 1-3 have 0.96V on them. It blips to 1.05V at regular intervals, so I think it's trying to do something but failing. Pin 4 has steady 1.14V. Pin 5 and 6 both have 19V from the adapter. Pin 7 has 1.5V, pin 8 has 0V.
PQ50 (AO4413): pins 1-4 have 0.35V jumping to 0.60 at intervals. Pins 5-8 have 19V.
PQ49 is the interesting one, also an AO4413. Pins 1-4 get 0.95V from coil PL10. Pins 5-7 have 0.35V from PQ50. Pin 8 is the odd one... it jumps from 0.1V to as much as 8V. Not sure where this goes.
Fuse F1 on the other side of the PCB tests good. No power on either side of it.
Anyone have any ideas from here?
Symptoms are - it's dead. No sign of power anywhere on the unit. Battery claims to have a charge via the built in gauge, but I doubt it works... it also gives me nothing to work with.
Power jack has been ruled out - I've been working with it using soldered in wires running to a compatible power brick.
Here's what I have for measurements so far:
PQ51 (an AO4914): pins 1-3 have 0.96V on them. It blips to 1.05V at regular intervals, so I think it's trying to do something but failing. Pin 4 has steady 1.14V. Pin 5 and 6 both have 19V from the adapter. Pin 7 has 1.5V, pin 8 has 0V.
PQ50 (AO4413): pins 1-4 have 0.35V jumping to 0.60 at intervals. Pins 5-8 have 19V.
PQ49 is the interesting one, also an AO4413. Pins 1-4 get 0.95V from coil PL10. Pins 5-7 have 0.35V from PQ50. Pin 8 is the odd one... it jumps from 0.1V to as much as 8V. Not sure where this goes.
Fuse F1 on the other side of the PCB tests good. No power on either side of it.
Anyone have any ideas from here?
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