No Display on My Acer 2021 LCD Monitor, Someone told me I may have to replace capacitors, But i dont have clue to open the monitor cover. Please help. ( there is no screws, I can see only one hole KEY LOCK pic on top.
This is a bit tricky, but not impossible.
1. Remove the two visible screws near the bottom.
2. Pull the plastic covers off the stand: Pull from the inside (nearest where the stand is attached to the monitor.
3. Undo the screws and remove the bracket.
4. Under the bracket is the final screw.
5. Try pulling the front off the back starting at the bottom. It'll require a little force.
6. Now you should be able to get a knife in to pull the rest of the case off. Leaver by pushing the front outwards and back inwards and the clips should come off ok.
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The monitor has faulty capacitors. Capacitors have a job to hold power long enough for your display. Faulty capacitors will only hold power for at least 2 to 8 seconds and a dead one will actually not hold power at all. The only solution is to replace the faulty capacitors. Get a computer technician to open up the monitor for you and locate the faulty, leaking, or bulged capacitors located on the circuit board where you connect the power supply. Note the polarity of the capacitors as you replace them.. (+) and (-)
When the capacitors start to go out it causes the power supply to not provide the correct voltages. You monitor has the back light power but the 5v power going to the video driver board is not working correctly. Here is a link to a repair guide that will show you how to open the unit, remove the power supply board and what capacitors need to be replaced.
If you are going to DIY and have proper tools and know safety precaution then please read on: Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, 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.
(Please be advise that if
you don't have the knowledge, the proper skills and the right tools to
open the back cover of your monitor and replace its part...don't risk
Otherwise, bring your unit to a credible technician and avail of warranty if there is any.....) If you have guts.. then do the following steps..
You said your monitor will blink but no picture display... well, there are possible reasons why this problem
Open the back cover of your monitor..Check the power supply section for possible loose
connections and blown capacitors.. Resolder any loose terminal connection on the pcb. Check for any blown capacitor, replace the capacitor with exact value, and also replace any bulging capacitor..If you have successfully replace the parts you can try to turn it on and connect the vga cable in it to the video card of your computer. Turn on also the cpu, if the monitor led turn green and the display came out..that fixed it.
2. In case you have successfully repaired the power supply section and the led of the monitor stays green.. then the problem will be in the inverter board section....Turn off your monitor... open the back cover...on the inverter board section.. check and replaced burnt or overheating high voltage transformer..if one or more of this overheats, it is enough to affect the supply current from the power supply section and that may cause to blow your capacitor...If the ballast transformer is working fine the last thing to check is the backlight inverter (the light that illuminate causing display in your monitor) Replace any busted lamp.. that should fix the black screen on your monitor. ..
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dauber58, Can you tell us more about this acer that goes BLACK! How old is the unit? When you say "comes up" did you really mean that it displays the image for 10.5 minutes or only 1--2 seconds, before the BLACK SCREEN of DEATH sets in??!!!!! If you were using the unit 1 or 2 days before, and it had a nice bright, crisp, full color image displayed on it, it might be a possible candidate for refurbishment. Your symptom is the CLASSIC LCD monitor failure mode. Check out youtube to view the longer vid clips of "lcd monitor disassembly", lcd monitor repair" to learn what BAD capacitors(electrolytic filter capacitors) are and how to replace them with new to fix up your monitor. Here is a clue as to why you should try to do this. You stated that the "monitor comes up"!!! With $10 in new electrolytic filter capacitors and a little luck you may end up with a good working display that will work for 1-3 more years. Get back here with any comments or further ?s u might have. Also visit www.ccl-la.com/badcaps.htm run by another fixya guy (buddymc) and www.lcdparts.net , www.badcaps.net so that you will be able to make a decision on what to do. Bye for now.
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