20 Most Recent HP f2105 21" LCD Monitor - Page 2 Questions & Answers

Sounds like an inverter problem. If the power supply is internal replace the capacitors coming out of the voltage regulators. These are usually 1000mf and/or 470mf. If that doesn't do the trick look up the numbers on the 8-pin chips that drive the secondary transformers on the inverter to see if they are getting the right voltages.
Good Luck!

maybe you have ghosts?
or, maybe the lines are conected...
i dont know... im just 23 years old

Push the menu button for 10~15 seconds to lock/unlock the control buttons.

Sound problem; try feeding it with MP3 player to see if you get the sound OK, need to verify if it is the monitor problem or the PC sound card problem first.

Basic LCD monitor and TV troubleshooting guide: http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide http://www.fixya.com/support/r7406380-tv_training_manuals Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm/

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.

If there was something wrong with the monitor itself it wouldn't go to sleep it would just turn off. It sounds to be as if there is an issue with the signal going to the monitor itself, try restarting your PC and ensure that the connection on the back of the monitor and the connection on the back of your PC are secure.

One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect your hard drive

Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

the leads from your ((motherboard to your hard drive)) make sure they have a secure connection and are not faulty or just replace them there probably old and faulty make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electic extensions or just replace them they are probably faulty a computer needs its connections to have an end so any faulty leads will end up with a computer error hope this helps don

One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect your hard drive Test the leads that attach to your ((hard drive from the motherboard)) or replace all the leads that attach to your hard drive including electrical extensions + IDE,SATA and the ones that attach from your ((motherboard to hard drive)) make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electrical extensions or just replace them they are probably old and faulty a computer needs its connections to have an end so any faulty leads will end up with a computer error hope this helps

Are you sure the lamp assemblies is/are bad? The screen will have to be completely torn down to get the lamp assemblies out, not recommend for beginner, I would practice on a broken screen first and it must be done in really dust free enviroment. You need lamp tester and a set of test lamps for testing the lamps and the inverter circuits.
All the voltages and fuses OK?
http://s807.photobucket.com/albums/yy352/budm/HP%20F2105/#!cpZZ1QQtppZZ20

Basic LCD monitor and TV troubleshooting guide: http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm/

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. Raw lamps: www.lcdparts.net

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.

To get your radio code you must go and see your local holden dealer and they will give you the code with no or a small charge. You will need your sr. no. of the radio & the veh. no. (have you checked the inside of your glove compartment for any sticker on the inside?)
Further details can be got here

if you see the post and when the windows come if its black the problem is in your resolution restart your computer and press F8 go tho safe mode where all the drivers will load in defult wait till the pop up screen comes click yes when it askes to open in safe mode when the destop loads right click and go to dieplay properties and reduce the resolution to 1024 x 768 and restart the computer

If it does not work when connected to more than one computer, it's time to take it to a TV/video repair store, for professional trouble-shooting and repair.

If it were smaller than 17-inches, I would say "cheaper to buy a new one than to pay for repair".

Beverly, F2105 unit will need to be disassembled and new momentary tactile switch soldered in. Check out ALL the different styles and sizes to choose from at digikey.com !!! at least 16 pages of switches to choose from. Then you will need a soldering iron, solder wick, solder, and know how to disassemble unit to replace a $2 to $6 switch. If contracting out the work to competent technician your looking at minimum $45.
Forget fixing the plastic button. Crazy-glue only option there.
12fixlouie

You will have to do some indepth troubleshooting inside the set, need to check the voltages and fuses first.
http://s807.photobucket.com/albums/yy352/budm/HP%20F2105/

Basic LCD monitor troubleshooting guide:

http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

jho delacruz, If very "strange stuff" is occuring on lcd screen, then you will do a lot of reading here at old 2005 web blog: http://www.lesliewong.us/blog/2005/05/02/hp-pavilion-f1703-flat-panel-display-blackout-solution/ The monitor internal power supply may need you to inspect and repair it to stablize the +5.00 volt and +12 volt dc supply rails. Let me know if you find bad capacitors on the printed circuit board and be sure to let me know the "brand name" of those that "swollen"/ "leaky".
Your unit may not be "black screen of death" symptom, but has failed for same reason as BSOD symptom. Keep in touch. 12fixlouie

You will have to open up and take the voltage readins before and after the problem occurs. It may be as simple as cold solder joints.
http://s807.photobucket.com/albums/yy352/budm/HP%20F2105/

If you are going to DIY and have proper tools and know safety precaution then please read on: Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums Post back what you see inside so we can guide you further and it will help out other people in the future also.

Basic LCD monitor troubleshooting guide: http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

http://en.wikipedia.org/wiki/Capacitor_plague Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

Bad power suuply caps, inverter circuits, lamps, fuses.
http://s807.photobucket.com/albums/yy352/budm/HP%20F2105/

If you are going to DIY and have proper tools and know safety precaution then please read on: Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums Post back what you see inside so we can guide you further and it will help out other people in the future also.

Basic LCD monitor troubleshooting guide: http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

http://en.wikipedia.org/wiki/Capacitor_plague Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

After repairing the on/off button for $100.00 and then rehooking up the monitor to my pc, the monitor has power but stays asleep even when I push in the menu button, I can't get anything to happen. HP techs tell me that the problem is with my computer although it worked perfectly fine before I unhooked all to send out the monitor.

I hooked all back up again as before but now the monitor will only say "monitor going to sleep" and nothing happens.

Wishing I had a solution. Thanks

You need to open up and check the fuse, voltages, caps:

Worst case will be the lamps assemblies.

http://s807.photobucket.com/albums/yy352/budm/HP%20F2105/

http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you. Please post back what you find.