Could some one help me with the above monitor as power supply is blown. Model number of the board is AR577 VP-583. The problem is Mos fet is blown as well as on the printed circuit board R811,812,813,814 are roasted hence can't find the value to replace it. If any one has the monitor opend or got circuit diagram please post it for me .
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.
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A white screen indicates the power supply board is not putting out the correct voltages to properly power the monitor, just the back light. This type of issue is caused by a failure of the filter capacitors on the power board. You can rebuild your power supply board and bring the monitor back to life by just replacing the the bad capacitors. The problem is that model the Acer AL1711 could come with 1 of 4 different power supply boards install depending and the date manufacturer and supply on hand. If you want to repair the monitor if you could open the unit and get either the model number of the power supply board or send a picture of the board to me I will be glad to help you repair the unit and get it back up and running. You can contact me to send the information at firstname.lastname@example.org
if no any power led indicator at the front panel after of shut down, the cause could be power supply failure. you will need to remove the back cover to gain access of the internal part of the monitor. look for a blown fuse or burnt parts at the power supply board. if you have an idea about electronic parts just replaced defective parts with the same rating and value. hope this can help good luck just let me know if you need further assistance.
Check power supply section for bad caps first. Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, blown fuses, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed ACER monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums Post back what you see inside so we can guide you further and it will help out other people in the future also. http://en.wikipedia.org/wiki/Capacitor_plague http://www.badcaps.net
sbra454016, Monitor has internal problem on "switch-mode-power-supply/ccfl inverter supply" printed circuit board. Check smps/ccfl supply board. Read my fixya profile to understand problem or skip the reading and trade-in for new wide screen unit. Reading is free. 12fixlouie
You need to open it up and inspect the power supply for blown fuse first, then look for bad caps with bulging top or leaking liquid. Post back what you find so we can guide you further, see example of failed monitors due to bad caps:
1. Unplug the AC power cord to make sure the power is off.
turn the monitor upside down, you need 2 people for this.
2. Pull the 4 hooks on bottom side of the base and hold.
3. Separate the monitor and base.
have you found a solution to this problem? i have the very same problem. i have taken apart the back of the monitor and found that if i take the small circuit board that is plugged into the power switch it goes away leading me to beleive that it is this small board but i do not know where to get it at. the number on the board is ar577 vk-583 rev:1. any help would be greatly appreciated. my email address is email@example.com
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.