Question about Acer AL1715 (Black, Silver) 17" LCD Monitor

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ACER AL1715 POWER SUPPY BOARD AR577 VP-583 TURNS OFF AFTER START UP

I HAVE AN ACER AL1715 17" MONITER THAT TURNS OFF AFTER A FEW SECONDS OF START UP. THEIR HAS BEEN A SOLUTION ON FIXYA OF REPLACING TWO CAPASITORS 680 UF,16V IN C152 AND C153 BUT I HAVE A AR577 VP-583 POWER SUPPLY BOARD AND IT DOES NOT HAVE C152 OR C153 NOR DO I HAVE ANY CAPACITORS OF 680UF,16V CAN ANYONE PLEASE HELP ME WITH THIS.

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  • MIKECABRERA Jun 16, 2008

    THANK YOU

  • Anonymous Aug 10, 2008

    horizontal lines on left side of screen

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I have an Acer 1715 that also turns on, then goes dark after a few seconds. The capacitors on the AR577 supply/inverter board were good, but I replaced them anyway. There is a good write-up with photos at:

http://www.electronicrepairguide.com/acer-al712-lcd-monitor-repair.html

This shows the board nicely and capacitors for the 1712 Acer, which is very close to the 1715.

This didn't cure my problem, and after chasing signals, I believe the problem is a bad inverter chip. The SG6841SZ on the back side of the board is a 20 pin gull wing surface mount package that drives the FETs to switch voltage off and on to the high voltage transformer. I know the diodes and FETs work because it comes on. The transformer drive stops when the backlights go out, though the voltages are all there. The 5V drive signal from the control board is there, so the problem has to be the inverter, or all 4 FETs.

If I can get hold of the part and it fixes it, I'll post it here.

Posted on Jul 29, 2008

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Bad capacitors will usually be bulging on the top.

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Posted on Jun 16, 2008

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