First time poster here, hoping to get some insight into what is going wrong with this monitor.
Monitor History - HP ZR2740W, given to me because it was faulting, I accepted it because of the retail value and possibility of resurrecting. I was told that it had been used for the past year and that the person I got it from was told that it was probably a back-light issue.
The issue - The monitor has a repeatable fault where if the power supply (separate switch near power cord) is turned on and the monitor is being fed a display signal (through DVI, checked with another monitor, and it then powered on with the power button on the front... the LED indicator will light up blue for the power-on cycle time of about 2 seconds with no display showing, and will then flash on then immediately off without any display showing. The blue LED light will remain constant the entire time this is going on but will turn itself off after ~30 seconds.
I have pulled out the power board and have inspected the board carefully (admittedly I am only capable of looking for obvious goo, bloating, etc.) and I see no sign of any bad capacitors, anything blown or soldered improperly. The only thing that I noticed was that there was some residue the seemed to be a spill of some kind of orangey/brown colored liquid that extended across the length of the board - I cleaned off with alcohol and have put the board back in and there was no change to the fault.
I count 20 capacitors (lelon) on the board and can only note that some of the tops of the caps seem to be more deeply imprinted with the cross-hatch than others and have slightly more curvature within each segment than others do, IE: some look more flat than others, but none are obviously bulging.
I am new to the whole scene and have not been able to find any threads of people repairing this particular model before, on this site or googling for other threads for a few hours
I have attached images of the front and back of the board.
Ideas?
Monitor History - HP ZR2740W, given to me because it was faulting, I accepted it because of the retail value and possibility of resurrecting. I was told that it had been used for the past year and that the person I got it from was told that it was probably a back-light issue.
The issue - The monitor has a repeatable fault where if the power supply (separate switch near power cord) is turned on and the monitor is being fed a display signal (through DVI, checked with another monitor, and it then powered on with the power button on the front... the LED indicator will light up blue for the power-on cycle time of about 2 seconds with no display showing, and will then flash on then immediately off without any display showing. The blue LED light will remain constant the entire time this is going on but will turn itself off after ~30 seconds.
I have pulled out the power board and have inspected the board carefully (admittedly I am only capable of looking for obvious goo, bloating, etc.) and I see no sign of any bad capacitors, anything blown or soldered improperly. The only thing that I noticed was that there was some residue the seemed to be a spill of some kind of orangey/brown colored liquid that extended across the length of the board - I cleaned off with alcohol and have put the board back in and there was no change to the fault.
I count 20 capacitors (lelon) on the board and can only note that some of the tops of the caps seem to be more deeply imprinted with the cross-hatch than others and have slightly more curvature within each segment than others do, IE: some look more flat than others, but none are obviously bulging.
I am new to the whole scene and have not been able to find any threads of people repairing this particular model before, on this site or googling for other threads for a few hours
I have attached images of the front and back of the board.
Ideas?
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