After a minute or so the inverter shut's down, so no light, and no picture. Turn off and on the monitor brings the inverter back to work for a minute or so. I turned the small potentiometer on the inverterboard, there seems to be a little influence on the time. Seems that there is a component overloading protection misadjusted or so. Does anyone have a schematic on this board, or an idea how to save 90 bugs to buy a new inverter?
Re: HP f2105 LCD monitor Backlight inverter problem
Simply open the set and cut that GRAY WIRE ON THE SET OF WIRES THAT CONNECTS THE POWER SUPPLY TO THE INVERTER CIRCUIT. 100 PERCENT WORKING AND TESTED BY ME. (hardwareman25 @ www.gsmhosting.com or email me @ email@example.com )
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Hi! When a monitor display image for a second and then goes to black screen... there are possible reasons why this problem
1. You need to check if the high voltage ballast
transformer of your backlight inverter is about to be burned... the
transformer is overheating..that's why you experience the monitor
working for a couple of seconds and then it will shut off until the
transformer cool down again and then it will be ready to work again...
2. Check also the backlight inverter if it is busted...the backlight inverter is the light source responsible for the image display you seen on your screen. If this are busted then all that you will be seeing is black screen
You need to check the power supply section for possible loose
connections and possible blown and bad capacitors..
the ballast transformer has direct
effect on power supply section.. when there is overheating
transformer,,, the supply current from the power supply section becomes
unstable.. and will not be able to supply the remaining good working
In case you do not know, the ballast
transformer generates high voltage for the backlight inverter to
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.....
Much appreciated if you rate this help...thanks...
dvdlmalle, Could be one or both causing problem. The first information I would need is date of manufacture and approximate total number of "ON" hours use monitor has seen during it's lifetime. Have you been to and read everything at http://www.lesliewong.us/blog/2005/05/02/hp-pavilion-1702-flat-panel-blackout-solution/ to see if anything sounds familiar??? Testing is done on the factory production line or by qualified "cold-cathode-fluorescent-lamp" back-lit lcd monitor technicians who deal with them on a daily basis. You should visit YOUTUBE for helpful video clips of lcd monitor disassembly and lcd monitor repair of the two most common types of unit failure if you intend to attempt DIY repair! You will also need to visit the fixya profiles of "buddymc" and "budmrtn" and other tech's for more info. Do you know the "flashlight" test? Good luck with the repair. 12fixlouie bye for now.
Does it do the same when you use this monitor with other PC, new VGA cable, just need to narrow down the problem first before start taking the monitor apart.
See pictures of what usually goes bad (mostly failed capacitors) with monitors: http://s807.photobucket.com/home/budm/allalbums Post back what you find so we can guide you further
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 he monitor. If you are good at electronics repair/soldering you can usually fix he 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 $45 plus shipping. If your problem is not the capacitors
then it would be the backlights and that is much more difficult to
I hope this helps, if so please rate my solution.
Corporate Computer www.ccl-la.com
Over 21 years of computer and printer support/repair