Question about Computers & Internet
Screen is black. "VGA Input" flashes on screen momentarily when fired up. Power light stays'ON'. Display can be seen faintly with a flashlight shone on screen. Voltages to logic board look good. Electrolytic caps have already been replaced. Polarities are correct-I did it myself.
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Posted on Jan 02, 2017
SOURCE: Constant white screen
check the brightness and contrast from the menu on the monitor try increasing it ... the problem will get solved...
if same problem persists contact ur near by experrt technician he may tell that the tube is gone he must recharge it....
Posted on Feb 06, 2008
I would check the caps with ohm meter. Make sure they all show increasing resistance. Caps can be bad without looking bad. Check output voltage on the power board, should be around 12V. If all that checks out then I'd look next at the backlight bulb. I'v repaired many monitors and the problem was almost always overheated caps on the power board. Post back and let me know.
Posted on Dec 03, 2009
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Try different video and/or power cables, but most likely this is dead. Sorry!
If it's still under warranty, (or the computer it came with is), call Gateway support.
Posted on Mar 10, 2010
m_r_murphy, The T220 may have developed an internal ac to dc "switch-mode-power-supply / CCFL inverter supply" power problem an you may need to need to have it repaired, Look into warranty or outside technician to refurbish the unit's SMPS/inverter!!! From your description, I believe that the SMPS is in "partial shutdown" mode!!! (no 12 to 14v dc) to power-up the "cold-cathode-fluorescent-lamps" that enable you to see the text and graphics that you already know are being displayed on your lcd panel!!! (+5vdc or 3.3vdc rail still alive!!!) You have "black screen" symptom!!! NOT BLANK n BLACK screen!!! There are lots of DIY videos on YOUTUBE to help you decide if you can attempt a cheap (<$20usd) repair to your unit. Do some reading in my old fixya profile (louie12fix) and visit some of the links you find there. Because your T220 isn't any different than any other brand of CCFL back-lit lcd display in it's basic design and operation you should be able to fix it. Get back to me lmistyrel on aim or do additional comment to this original post here on fixya with info on your next step to repair this unit.
All the other ccfl back-lit lcd monitor tech's on fixya already know what's wrong inside your unit!! Do your research first!! Bye for now, 12fixlouie
Posted on May 07, 2010
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