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LCD Monitor my hp f2105 lcd widescreen monitor screen goes black after 1 sec when you turn it back on it again stays on for only 1 sec any help would be good, thanks

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Is it connected to a PC? is the power source good 110v or 220v?

Posted on Mar 30, 2008

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My hp f2105 monitor stays on for only 2 seconds and blacks out again how can i fix it?


The light comes from 4 luminiscent tubes. They are empowered by high-voltage power suppy. There is a circuit, that continuously monitor the lamps and the quality of the power from the low-voltage power supply. Either there is a faulty light tube, or there are inflated capacitors on the LVPS. First one is hard to repair due to need to open the LCD itself, which is hard and dangerous, the light tubes are hard to find and LCD is hard to clean perfectly when closing and appear dirty spots on the screen. The second one is easy - visually inspect the capacitors and if their top is not flat, then replace all of them with the relevant capacitance. I suggest to use capacitors for higher voltage (35V) thus making the PS lasting forever.

Apr 07, 2012 | HP f2105 21" LCD Monitor

1 Answer

Hp f2105 black screen after 2 sec on?


You've asked this question in two places. This is confusing--try to ask it in one place only.
I answered it in your other request.

Nov 20, 2011 | Rosewill R700J 17" Flat Panel LCD Monitor

1 Answer

My monitor won't stay on it will go black after a sec. If you turn it off then on the monitor will work for a second the it goes off again. I have unplugged cords and it still does it. I have a hp f2105


It is "normal" for a monitor to "go black" when it is NOT connected to a computer.

Connect it to a different computer, to see if the video-card on your computer has failed, and to see if the LCD monitor works at all.

Dec 15, 2010 | HP f2105 21" LCD Monitor

1 Answer

MY HP f2105 21" LCD Monitor is blank, when I reboot, at the startup, I saw only one or two second of HP opening screen and monitor goes back like if there no connection. In I shut off the monitor and...


You may be having either the power supply failing due to bad caps, or failed backlight inverter circuits due to short circuits, loose connection due to bad solder joints, or failed lamp assmblies. You will have to open it up and inspect the inside. Do you have proper tolls for electronics repair, isolation transformer for safety so you do not get killed by high voltages inside the monitor?
You can see what your monitor look like here:
http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

May 31, 2010 | HP f2105 21" LCD Monitor

1 Answer

HP f2105 21" LCD Monitor is going to sleep after 2 sec.


Try it on another PC so we can narrow down the problem before taking the monitor apart. Please post back. It can be the setting on your PC, vide card problem, need to narrow down first. I will be working a third one of this model tomorrow and I will upload the pictures of what inside tomorrow.
http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

Apr 17, 2010 | HP f2105 21" LCD Monitor

1 Answer

HP f2105 monitor going into sleep mode on it's own


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

Apr 03, 2010 | HP f2105 21" LCD Monitor

1 Answer

Screen shows for 2 seconds, then black, power button still on


You could have an inverter problem or a faulty CCFL lamp/s.
For service, parts and DIY info I found LCD Parts helpful, use this link to get to their WEB site :-
www.lcdparts.net

Sep 25, 2009 | HP f2105 21" LCD Monitor

2 Answers

Starlogic 20 inch widescreen monitor screen keeps going black


This is probably a back light problem. Take a bright flashlight and while the monitor is on, point it at the LCD and try different angles, etc. If you can see an image, it is the back light, probably the back light voltage converter unit in the lcd. It could also be the back light bulbs.

If you don't see an image with the flash light, then it could be the main logic board.

ort11

Mar 08, 2009 | Computers & Internet

1 Answer

Hp f2105 only stays of for 2 seconds


Hi there mate i have a hp f2105 with the benq power supply in it which as gone faulty could u look at your power supply and tell me the numbers on the power ic which is ic651 thanks.

Jan 13, 2009 | HP f2105 21" LCD Monitor

1 Answer

Screen goes black


It could be a bad backlight bulb.

Sep 08, 2008 | HP vs15 15"LCD Flat Panel Monitor

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