Having problems with your Computer Monitors ?

Clarity bobcat monitor, no picture black screen

\015 Unit has black screen will not show picture. A co worker was able to get the unit to work for a couple of hours prior to it returning to a black screen.\015\012\015\012Thanks,\015\012Dan\015

Answers :

This is a generic symptom that could happen to any LCD\015\012monitor.
\015\012\015\012\015\012The following is a generic answer applicable to most.
\015\012\015\012\015\012
\015\012\015\012\015\012Two possible causes are bad capacitors or a bad light inside\015\012the LCD panel.
\015\012
\015\012Open the unit and check to see if any of the capacitors in the power supply or\015\012other boards look domed or vented on the top.
\015\012
\015\012Replace any capacitors accordingly. Use the same value capacitors. Most often,\015\0121000uF 16V or 25V, 470uF at 16 or 25V, 220uF at 16V or 25V.
\015\012
\015\012If this doesn’t solve the problem, try checking the surface-mount transistors\015\012on the inverter board that run the lights. Some times these transistors go bad.\015\012Check the area for any cracked or overheated ceramic or mylar capacitors.
\015\012\015\012\015\012Also, you may have a bad light inside the panel. This is\015\012tough to test without a spare light to use for troubleshooting.
\015\012
\015\012You can take the panel apart and inspect the lamps but it is very tedious. It's\015\012tough enough to get them apart and back together again never mind keeping the\015\012layers clean. You have to try not to get any dust between the layers or you\015\012will see it in the picture.
\015\012
\015\012There are usually two light fixtures each of which holds two lamps. One fixture\015\012is at the top and one at the bottom. Remove them one at a time and inspect the\015\012lamps to see if any are broken or very dark on the ends. If one looks out of\015\012place, it could be bad.
\015\012
\015\012You'll have to find replacement lights on the net. It's not easy to replace\015\012them, but if you've gone this far, good luck. You should be able to get generic\015\012instructions off of the site that sells the lamps.
HP f1503 flat screen monitor remains bland when i turn it on, though the monitor light shows it is on. I can shine a light on the screen, and see that it is working, but not bright enough to see.
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