Question about ViewSonic A90f+ 19" CRT Monitor

1 Answer

Viewsonic lcd tv 37"

No signal displayed at top of screen display keeps changing colors from red to green to blue to white to rainbow to black... nothing works, no buttons, no remote, no power button..

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  • donmegatron Jan 14, 2009

    this is a TV, i unplugged it for 10min and plugged it back in and now works again but its really weird...
    1.) I CAN turn on the TV with the remote, but
    2.) Can't change the source
    3.) Can't change the channels, can't even turn it back off with the remote, or the button. I have to unplug it to turn it off.

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  • 22 Answers

Try to check the RAM, video card, or processor maybe it is not properly inserted to the slot.

Posted on Jan 08, 2009

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1 Answer

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You may need to send in unit for service because your unit is unable to go to sleep mode when the signal cable is disconnected or the PC is turned off. Please call ViewSonic Customer Care for support.

Although this will not hurt the monitor, you just need to apply an active video signal to get a display correctly. However, it will not work as expected to go into sleep mode. You'll need to call ViewSonic Customer Care to get this taken care of.

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1) The set of input (Yellow= Composite video, Red= Right channel audio, White= Left channel audio). This set of input is for composite video.

2) The set of input (Red= Red video signal, Green= Green video signal + sync, Blue= Blue signal, Red= Right channel audio, White = Left channel audio (the Red and White will be grouped close together). This set of input is used for Component video for HD signal.

You should try using composite video source (Yellow RCA jack) from DVD player and feed to the monitor and see if it works OK with all color showing that way we acn find out if it is the video source problem or the monitor video signal processing problem. Try the PS2 on the TV if it works OK 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
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.

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My screen is revolving colors blue, green, white, and red and will not stop


Display of color strips on the screen is the default behaviour of the LCD screens when there is NO INPUT. This means that the LCD is working fine but there is no input/ signal from the PC. So, make sure that your PC is working fine and the video (VGA) cable properly connected to the LCD.
Let me know if any further clarification/ assistance is required.

Good Luck!
Hope this helps!
CreativeTECH

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Yes you can if you can source one however it may be more cost effective to replace the monitor.

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hi there, it may be that the RGB balance has been changed. Try getting a person that knows about monitors to calibrate the colors correctly. Or, connect the computer to a different monitor. If it still displays blue, it's a problem for a expert.

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Check the information at Viewsonic's website regarding their warranty:

http://www.viewsonic.com/support/warranties/limited-warranty/

If you have your proof-of-purchase and it shows the monitor is less than a year old, it would be covered. You would need to follow the procedure on their website to have the unit repaired or replaced, but it would not be your job to try to fix it.

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LCD screens occasionally have what are called "Stuck pixels". There is a tutorial in wikihow which might help you out here:

http://www.fixya.com/manuals/w153177-fix_stuck_pixel_lcd_monitor

Try that and see if it helps. Stuck pixels are actually a slighty common problem.

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Sorry time for a new monitor you might open it up and look at the capacitors and see if any need to be replaced the bad ones will be domed on top normal is completely flat

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Recommend to go to the color settings and change it to the use settings and adjust accordingly.

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