This one has been kicking my butt for a week or so and it's time to turn to the people with more experience. Rather than the usual case where I am the nominal owner of the monitor, this is one where the owner wants some help troubleshooting it.
When turned on it gives a display for about two seconds, then a black screen. If not connected to a computer about 10 seconds later the power led goes from green to orange. Turning off, then on will give the same thing. Also no difference if it's just been plugged in, or if it's been on for a few hours.
If no signal source is present it gives the 'No Signal' message, if hooked up to a working computer it will properly display the computer output when the monitor power is cycled. It's obvious - the inverter is shutting down.
A visual examination shows no burns, no deformed caps, nothing obviously wrong. The ONLY thing I never saw before (remember, I have very little experience with LCD monitors) is the inverter. It has two transformers (one at each end) and a single connector at each end. HOWEVER three pins of each connector are in use and there are two sets (one from each connector) of three wires (2 pink, one white) running to the backlights. Is this simply an alternative to the 4 connectors / 4 sets of wires I am familiar with?
While they look fine, the power supply uses a pair of Ltec LZG 1000uf 16V caps. The don't appear on either the good cap or the bad cap list. The inverter has a single 150uf 35V cap, no discernable manufacturer (which does make me slightly suspicious).
Any suggestions before telling the guy to replace the caps, even though they don't look bad?
Thanks,
PlainBill
When turned on it gives a display for about two seconds, then a black screen. If not connected to a computer about 10 seconds later the power led goes from green to orange. Turning off, then on will give the same thing. Also no difference if it's just been plugged in, or if it's been on for a few hours.
If no signal source is present it gives the 'No Signal' message, if hooked up to a working computer it will properly display the computer output when the monitor power is cycled. It's obvious - the inverter is shutting down.
A visual examination shows no burns, no deformed caps, nothing obviously wrong. The ONLY thing I never saw before (remember, I have very little experience with LCD monitors) is the inverter. It has two transformers (one at each end) and a single connector at each end. HOWEVER three pins of each connector are in use and there are two sets (one from each connector) of three wires (2 pink, one white) running to the backlights. Is this simply an alternative to the 4 connectors / 4 sets of wires I am familiar with?
While they look fine, the power supply uses a pair of Ltec LZG 1000uf 16V caps. The don't appear on either the good cap or the bad cap list. The inverter has a single 150uf 35V cap, no discernable manufacturer (which does make me slightly suspicious).
Any suggestions before telling the guy to replace the caps, even though they don't look bad?
Thanks,
PlainBill
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