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Monitor led is blinking or steady, but the display does not come up


ginko
By Guru ginko
Rank: Guru
Rating: 89%, 4894 votes
posted on Apr 22, 2009
Helpful

The monitor is probably on protection.

To start unplug monitor from power and from computer and test computer with different monitor to find out if it is monitor or computer fault.

If it is computer fault and no video signal , then test:

  • Video cable.
  • Video adapter on PC (sometimes integrated on motherboard)
  • Motherboard.

If it is monitor fault , then the monitor is on protection.

When on protection you keep having a flashing led on front of the monitor , and monitor turning off by itself after a while, that indicates a fault condition.

The flashing light indicates a diagnostic state called protection.
When the Monitor goes on protection there are only two possible causes.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or a broken contact, identified an internal fault and kicked in , starting the flashing light.


If you are in situation one, then the monitor will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

Common faults that can occur are a blown capacitor on power board, faulty inverter board, faulty input board, or a fault on LCD Digital Controller board.

Check also the video cable or any external connection cable, if the cable is shorting, or the connector is bad, you can get same flashing state because of the video cable.

Try moving the video cable, and if the cable is not built in, then also try a replacement cable.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

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Comment #1

posted on Sep 16, 2009

mnow
By Apprentice mnow
Rank: Apprentice
Rating: 0%, 0 votes

C10 - 11 on my board are definately not 820uf
they might be as big as .1uf though

Comment #2

posted on Sep 16, 2009

cryptograph
By Apprentice cryptograph
Rank: Apprentice
Rating: 0%, 0 votes

C10/C11 on the inverter board: are those the SMD capacitors on the board under the small metal housing, or are they on a different board/do you have pics?

Comment #3

posted on Sep 11, 2009

rdriscoll
By Apprentice rdriscoll
Rank: Apprentice
Rating: 0%, 0 votes

I have fixed 6 of these so far. All you have to do is replace capacitors C10 and C11 on the inverter board. They are 820uF 25v. The stock CAPXON capacitors are known to be bad.

It cost me $2 per monitor.

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