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.
Re: ACER AL1715 POWER SUPPY BOARD AR577 VP-583 TURNS OFF...
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:
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.
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Unfortunately, that symptom usually is caused by a failure in the power supply board , that is internally mounted inside your LCD monitor. It is possibly repairable, but usually it is about as cheap to get a new monitor.
More often then not, this is attributed to a failing Backlight Inverter. A Backlight Inverter, is a power board mounted below the screen that actually send power to the Lamp inside the LCD itself. Check to see, when it goes out if there isn't still some images faint in the screen. If this is the case take it to a local repair shop and have them order one and replace it. repair cost for this shuold be around 65-100 dollars.
If this helps, please rate my solution. Have a great day.
This usually means the Power Inverter board is going bad. If you're a bit savvy with tech repair, you can look up and order a replacement board - LCD inverters for MANY LCD models are available on ebay and amazon - they're relatively easy to replace. Just make sure the power is UNPLUGGED before to start taking apart the display!
I have the service guide for this monitor and the values for the R811 to R814 are the same: 1.8 . The mosfet is a 2SK2645. I will like to send the pdf file, but I new in this site and I don´t know how to attach a file due the only options that I see is a link, image or you tube clip.
Failing capacitors in the power supply will cause this problem and it's fairly common accross all brands.
The parts are cheap, but the labour costs can be high.
If you cannot do this procedure yourself, and also understand the dangers of the electronics, then call several TV repair shops in your area to get a quote, you maybe surprised how much the price can vary.
Just advise them you need to have the capacitors on the power board replaced. It will help them give you a more accurate quote.