Question about ViewSonic VX924 19" LCD Monitor

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924x green led flashes slowly,no picture on screen.Shows no input note on screen when vga cable unpluged {normal} back lights come on briefly untill flashing led starts.Led stedy green when no video input hooked up.mydemise04@yahoo.com

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  • osie2007 Jan 04, 2008

    I had mine fixed,it was the capacitor on the power board,30.00 is all it cost to repair,look on ebay for for the name It services,there are local here so i just droped it off and two days later it was done,they specialize in veiwsonic monitiors of another type,but do other repairs as well,hope this helps you all out.

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Having the same exact problem...it started with the green led power light flickering and it would take a long time to come up and then it got progressively worse...now the led light flickers red, yellow, green and the screen displays white lines randomly as the led light flickers...seriously doubt that the monitor is repairable....paid $500+ bucks for this sucker and have only had it for 1.5 years...have 3 CRT monitors that only cost $100 bucks from the mid 90's that are all still running strong (none are ViewSonic monitors), so needless to say we are very very disappointed in the QUALITY of ViewSonic Products. Our Company Will Avoid ViewSonic Porducts at all Costs in the Future!

Posted on Jan 03, 2008

  • digitaldawg Jan 03, 2008

    We Checked our power source/brick and it is fine....the monitor appears to have other issues besides the power source and it is ready for the scrap pile....We recommend that you Don't Buy A View Sonic as they are over priced for the Quality that they offer and there are many other brands out there that offer better quality and better support.

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It sounds to me like your losing the high voltage on the inverter board after the board warms up.Could be the transformer or a capacitor on the inverter brd.

Posted on Dec 29, 2007

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This is NOT Viewsonic's fault, it's one of their component suppliers problems. They have a good design, but the capacitors are failing prematurely. See below for a solution.

+++++++++++++++++++++++++++++++++++++++++++
This is the same problem with my 4 VG800 Monitors, you should be able to find the correct capacitor on your monitors by following the same procedure, I'm sure the boards are similar. Just get the correct value capacitor and try it in parallel with the initial filter capacitors right after the DC power in.
+++++++++++++++++++++++++++++++++++++++++++

Alright, I had 4 VG800 monitors with the exact same problem. The front led is blinky OR constant reddish/orangish OR picture is white with colored vertical lines OR no picture with whistling from the back of the monitor and backlights illuminated. All problems have the same solution. You need to disassemble the monitor (2 screws on the back, remove lower front button panel, remove 2 screws holding panel in and remove speakers, then remove panel and unplug speakers. Now remove lots of tape and screws from the cover in the center of the monitor). Now that you've exposed the amplifier board and the VGA to LVDS board, you want to look for the pair of 25V 100microfarad capacitors that are nearby the DC power in (they are right next to the black "100" inductor). Desolder the capacitor farthest from the DC jack and replace with an electrolytic with the same specifications. If you want to check that this is the correct solution please put the new capacitor (WATCH THE POLARITY) in parallel with the capacitor there want watch the front panel indicator go green and the monitor work properly.

I'll be posting and Instructable entry in the next few days on the process, watch for the username Waterppk on the website www.instructables.com

-Chris

Posted on Mar 18, 2008

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SOURCE: veiwsonic 924x

This is a generic symptom that could happen to any LCD monitor.
The following is a generic answer applicable to most.

The most possible causes are bad capacitors or a bad semi-conductor.

Open the unit and check to see if any of the capacitors in the power supply or other boards look domed or vented on the top.

Replace any capacitors accordingly. Use the same value capacitors. Most often, 1000uF 16V or 25V, 470uF at 16 or 25V, 220uF at 16V or 25V.

If this doesn’t solve the problem, try checking the surface-mount transistors on the inverter board that run the lights. Some times these transistors go bad and can cause the power to cycle up and down. Check the area for any cracked or overheated ceramic or mylar capacitors.

Don’t forget to check for caps on the main board. Some times these boards are overly simple and only have a couple of caps, but other times they are teaming with them.

Posted on Feb 14, 2008

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Method #2
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3. Counting the buttons on the front of the panel from left to right as 1 – 5, hold the buttons 2 and 4 down at the same time (see attached picture) and while continuing to hold the buttons, plug the power cable back in.4. Keep holding the buttons for 5 seconds after the power has been plugged in and then let go. The green light should be steady when you release the buttons.
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This is a generic symptom that could happen to any LCD monitor.
The following is a generic answer applicable to most.

The most possible causes are bad capacitors or a bad semi-conductor.

Open the unit and check to see if any of the capacitors in the power supply or other boards look domed or vented on the top.

Replace any capacitors accordingly. Use the same value capacitors. Most often, 1000uF 16V or 25V, 470uF at 16 or 25V, 220uF at 16V or 25V.

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Don’t forget to check for caps on the main board. Some times these boards are overly simple and only have a couple of caps, but other times they are teaming with them.

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