Question about Computer Monitors
From cold- the screen has horizontal lines across the screen that make using it impossible. One the unit has been on for 10-15 minutes the lines slowly start to disappear and I just get the occasional line flashing randomly. If unit is left on and it enters power saving mode, upon awakening it the lines will start again -but usually quickly clear. The same it true if I toggle the power switch or remove and replace the the VGA cable from the unit.
Below I have attached an image. Also a link to a bigger picture but I'm not sure if it will work as this the first time I've tried to link to an externally hosted file!
I've opened and inspected the units power supply, but all the components seem fine. I've test the capacitors and resistors. The capacitors charge as expected and the resistors are not open circuit. No visible bulging or leaks from the caps. All the step-up transformers look fine. All the diodes tested okay too.
Frankly I'm running out of ideas, the only things I can think of are,
1 - faulty connector
2 - a fault on the controller board
3 - a thermal problem with one of the components, tolerance related.
IF required I have several photographs of the Internals -if that's of any help. Although please excuses the quality, I'm not a great photographer :)
Any help would be much appreciated.
Replace it, it is going bad. I could tell you what would cause this such as bad driver IC etc. but bottom line is its five years old, you got your moneys worth out of it so bite the bullet and get a new one.
Posted on Feb 11, 2008
YOU NEED TO CHECK TO SEE IF THE CAPASITORS ON THE POWER SUPPLY AND MAKE SURE THERE NNOT BULGED OUT OF LEAKING IF THEY ARE THE NEED TO BE REPLACED
YOU SHOULD BE ABLE TO FIND EVERYTHING YOU NEED AT RADIO SHACK FOR LESS THEN 20 BUCKS
Posted on Feb 05, 2009
are you getting a check signal cable message? any on screen instructions?
try the cable, if it works on another monitor, then sorry to say but your monitor is fried
Posted on Sep 01, 2009
SOURCE: Nov 21, 2008
Please post the pictures, that will help. Do find any fuse in the inverter circuits, if you do have 5v (for logic) and 12v (for backlights), then may be the power supply is OK but I am not sure that the inverter is using 12vdc since you have some caps rated at 35vdc, Iwould expect the inverter to be using 24vdc for backlights. See some of the pictures I posted here: http://s807.photobucket.com/home/budm/allalbums
Posted on Jan 11, 2010
SOURCE: I have a HP vs17
That is the primay side of the power supply so be careful, you should check the DC on the secondary side for 5vdc (logic) and 12~16vdc (backlights inverter). Basic LCD monitor and TV troubleshooting guide: Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you. Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.
No bad caps iwth domed tops at all?
Please look thrugh my albums and read my guides.
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm/
Please leave rating if it helps.
Basic LCD monitor and TV troubleshooting guide:
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.
Posted on Jan 18, 2011
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