TDV Vison Computers & Internet - Recent Questions, Troubleshooting & Support

Hi. I have have repaird a few monitors, the acer one was the back light, but it was I think 7 capacitors, they were old, aged, and stopping the light from working. So, get it apart, and replace ALL the caps, they are not expensive, do not touch the parts when powered up, it is high voltage, and will probably hurt you whilst killing you, so, DONT TOUCH! Check out web for any other help, lots of videos to show you how to proceed. Ray.

set it's resolution

Check all the cables, if it is not the cables being loose, then it is a component inside that is starting to fail.

First of all make sure this is not just a button issue like having the BRIGHTNESS turned down too low. If you are unable to see anything including the menu screen items then the problem is probably not just a wrong display setting.

Turn on your monitor and then turn off all the lights in the room to check if your screen is completely black or if there is still a glow coming from it even though there is no video signal.

If your monitor screen stays completely black, then you most likely have a problem with the power supply to your backlight inverter circuit. This is normally caused by some failed electrolytic capacitors.

If you disassemble the unit and look on the power supply circuit board, you will probably see some scorched or bulging / leaking capacitors there. These components (usually around 6 of them) will need to be removed and replaced with new ones.

The repair procedure is not extremely difficult if you have some basic electrical safety knowledge, and some decent electronics repair / soldering skills.

You will need to unplug the power cord from the unit, and then remove the rear access panel or the entire rear cover as required in order to access the circuit boards inside.

Disconnect and remove the faulty circuit board. Desolder and remove the faulty capacitors and replace with new ones from your local or online electronic parts supplier. Then just reinstall / reconnect the board and test.

Here is a link to another Expert's solution to a similar problem which includes links to his excellent and informative set of LCD TV / MONITOR TROUBLESHOOTING GUIDES:

http://www.fixya.com/support/t10008425-when_turn_tv_picture_flicks_off


These guides will give you some idea of the various problems with LCD monitors and the associated repair procedures.

If you choose to rate BUDMRTN's troubleshooting tips by clicking on the YES THIS WAS HELPFUL icon on his solution page at the above link, then I thank you very much for your time and consideration.

Please comment back here to this page if you have any details to add, have any questions, have difficulty with the links, or just require further general assistance and I will respond as soon as I see it.

I hope that was helpful to you, good luck.

Joe.

you probably just have a loose wire

This sound like a bad capacitor ..-::>please click here and follow the guide.

Press Accept or replay

I have a solution for this

Bruce

It may have dying power supply due tho bad DC filter caps which are the cause of most monitor failures.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on: Basic LCD monitor and TV troubleshooting guide: http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague Parts: www.shopjimmy.com Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps. Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series. Please post back what you find.

It may have dying power supply due to bad caps, look for that first, may need more troubleshooting.
If you are going to DIY and already try the monitor with another PC, 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/albums/yy352/budm/ 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 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

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.

could be the grahics card on your pc.

connect monitor to a laptop.

if there is not interference then its the pc video card.

Welcome to the world of disposable LCD monitors. I got one of these at Fry's, but have had no problem except that it won't accept HDMI input from my DVR.
Check the screen after it blacks using a flashlight to see if you can see the actual information displayed. The LCD is backlit with CCFL - cold cathode fluorescent light - tubes located at the sides or the top/bottom. They can go bad, and over draw the inverter, or the inverter, which converts ~12vdc to ~10,000Vac, can have capacitors which are low quality and are drying out, changing their value.
So, open the display up by un-snapping the plastic cover, removing the screws holding the metal support to the backside of the display, and then the back cover. Most have snap-together bezels that can be separated by using a thumbnail between the two pieces. You should then be able to inspect the power supply, inverter, and display logic board. Look for capacitors that have drooled or have their tops puffed up. Those are signs of failure.
Let me know what you find.
tom

Check with the manufacturer and see if there is a driver download available. It might need that to be updated or re-installed.