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Re: how to repair
MY SUGGESTION IS TO BUY A REPLACEMENT MONITOR AN LCD BECAUSE IT USES LESS energy about 50% less and at a low voltage.
YOU PROBABLY CAN FIND ANOTHER RELAY AND CAPACITOR ONLINE OR AT A TV REPAIR SHOP electronics supply warehouse BUT IF THESE COMPONENTS WENT BAD
OTHER COPONENTS MAY BE BAD ALSO AS A RESULT OF THESE HAVING FAILED SOMTIMES RESISTORS,DIODES AND TRASISITORS LOOK GOOD VISUALLY BUT ARE NOT.
Save your self sometime and money by getting a new lcd monitor
even if you repair your monitor its still old if you replace this mointor with a new one you elimiate all risk because a new monitor will have all new parts and a warranty and save money on your electric bill because it takes less power to operate.
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There is a short within the HT section and this can be possible with the failure of the flyback transformer or the driver transisitor. So if you are equipped please open the back panel and check for shorting on the driver, also when powered this can heat up which confirms that the flyback is shorted. replace with the same type.
Before you open it test the input use analog multimeter for continuity testing,
if the pointer moves forward then turns back quickly your rectifier diode is good but the pointer is steady like this image below
Make sure this power cord connected to
your monitor before testing.
you have shorted semiconductor inside. check the thermistor, the bridge type diode & relay switch can cause of blown filter capacitor if you did not found these shorted at the primary section of power supply.
It sounds like you have a monitor with a common problem. After a few years some LCD monitors
will blow a power supply. The problem is caused by parts called
capacitors overheating in the confined space of the monitor. If you are
good at electronics repair/soldering you can usually fix the problem. Check out a few pictures on my web site www.ccl-la.com/badcaps.htm You can take the back cover off your monitor and look for the bad parts,replace any that look like the pictures and your monitor should work
fine. The capacitors do need to be installed with the correct + and -
connections, note the stripe on the old one and insert the new one the
same way. If you don't want to try the repair yourself we offer a repair service for $35 plus shipping.
I hope this helps, if so please rate my solution.
Buddy Corporate Computer www.ccl-la.com Over 21 years of computer and printer support/repair
My monitor started to flash for 3 or four minutes before starting up, this was after three good years of faultless service. (I've always found Acer monotors to be excellent value) I was just about to purchase a pair of new monitors online when I decided to take it apart, as I had nothing to lose. I found that 2 capacitors on the mainboard had bulged and leaked. A quick trip to Maplins and 79 pence later I was armed with 2 new 1000uf 16v capacitors and within five minutes had removed and replaced the damaged items. I now have my good old AL1912 back in service.
Typical failure is High voltage supply. Can you hear a high pitch whine or the relay click on and off? You will need some test point reffence voltages for the board and confirm you do not have a damaged VGA cable. It is not easy to give step by step via forum. Google "monitor repair", there were a couple good general guides that are printable. If youe high voltage tranformer (flyback) is gone, do not go any further. Price of a monitor flyback is $65 to over $100 depending on model.