Question about Computers & Internet
Monitor just switches off
All cabling plugged in correctly
All power ok
Turn off monitor set to never
I've just spent ages tracking this one down. In my case it is the protection circuit in the backlight invertor. The tubes are worn out (they are pink when they first come on) and need replacing :((.
If the picture disappears and the blue light in the ON switch stays on, you've probably got the same trouble.
Posted on May 26, 2009
Hi every one, yes had same problem with this monitor made by Proview (not Philips or Xerox) what crappy stuff pc-world/Xerox try to sell, this monitor that i am now using now came with the stock problem, 3 years old and back light switching off after 3 seconds but the LCD panel working, to check shine a torch into the display. I first checked the net no answer except check for blown capacitors, check the PSU board no visual signs of blown caps but noticed a 2 volt drop on the main supply (after 3 second approx.) that drives the inverters and the main PCB, i had a check of main components on the PCB all seemed ok using a digital multimeter. After checking the net again, a blog suggested to remove the CCFL lamps to check if they were turning pink, sign of the lamps needed changing and that the inverter protection was kicking in. After 20 minutes taking the panel apart (first time i have done this) and then removing the CCFL lamps and plugging them into the PSU board they were fine (bright white in colour) so i reassembled the panel and to my surprise the fault had cleared itself. The fault could have been a loose/badly fitting connector or the ends of the CCFL lamps arching/shorting high voltage to the metal surround or maybe the connector on the back of the panel that connects to the LCD drive PCB (two lumps of glue on each end of connector), when taking the monitor apart take note of the CCFL lamp connectors (little black dots) anyway I’m happy now as i was given it for free (freecycle uk) but i still prefer my ASUS vw19 from ebuyer.com there the best john.R UK
Posted on Aug 30, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL.
Only work inside the computer case when the power has been switched off and disconnected. Never open the power source.
Test all power and data leads that attach to your hard drive IDE,SATA
the leads from your (motherboard to your hard drive) make sure they have secure dust free connections and are not faulty
If its a 40 pin flat ribbon type it will be the first to fail.
Even something as small as a faulty electrical fan and its lead can cause you problems
computers need all power and data to continue through every working device and to have an end so any faulty leads will end up with a computer error.
Make sure your graphics card is securely seated with no dust built up or in the socket
if you remove your graphics check the socket to make sure its dust free.
Restart your computer then reinstall it this should activate found new hardware wizard
Check the VGA cable connection running from the computer to the monitor.
This cable must be completely inserted into both VGA connection ports, otherwise the video signal is not going to reach the display.
Disconnect the VGA cable from the computer and monitor, then look at the metal connectors on both ends.
If you are missing connection pins, the video signal is not going to transfer between hardware correctly.
To fix this problem, you must obtain a new VGA cable (at any computer or electronics store) to send the video signal.
Examine the power connection on the monitor.
If the monitor is not receiving power, it is not going to turn on.
Turn off the monitor for a few minutes, then power it back on.
Like other computer hardware, the monitor may not initially turn on correctly.
Move the mouse and press the "Enter" key on the computer keyboard.
If the computer is in sleep mode, the monitor is going to appear as if it does not have any display.
Hope this helps.
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