Question about ViewSonic 19.0" VG910B 1280X1024 TFT LCD (Silver/Black) Monitor
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Posted on Jan 02, 2017
PLEASE read Carefully so here is a fix for the green blinking light ...the monitor is going into shutdown....protect mode......THIS is ...Only for the seasoned electronic service tech ......YOU NEED TO BE into Electronics ..or have electronic background and know how to solder to do this........I been doing repairs for 30 years now ..............After extencive troubleshooting and replaceing a lot of electrolitic caps on the inverter board and spending about 10 hours doing so ....i decided to eather go for broke and blow this up more or trash the unit......................Well my blinking light deal went away...my monitor you could see it trying to start and just shut down............first of all make sure you have no broken solder work on the inverter board or swelled up caps ...Thay use lead free solder so the solder work sucks also...........I did pull the main buss line from the inverter pc board that runs the transformers to test to see where the trouble is.....found its at the high voltage end of the inverter board and The viewsonic 922 uses a protection ic on the inverter board and it tells the controll ic whats the High voltage status of the inverters.....I soldered a 47uf @ 25 volt cap on pins 7&8 of ic-u2 [ bi3101a ] Pin 7 is posivtive pin 8 negative of the cap.... and then soldered pins 10 and 11 togeather on the other side of the ic.......ITs fooling that ic telling the main controll / protect line thats all is well........I would guess the whole deal is LOW inverter voltage or maybe a surface mount device thats going to go........could be low resistor tolerence also............The monitor been working for a week now.........Always on.....anyways........YOUR problem may just be bad solder or bad caps...........if you Have a electronic background or have a friend that works on electronics have him look at the caps.see if any or swelled or rounded on the top of the caps..Also chect the main plug that goes to the LCD backplane to make sure its in correctley................if all that checks then the problem is ON THE INVERTER BOARD ONLY ......befor doing what i have done......I also have a Viewsonic VA-800 that had some of the same problems also ,but it had a lot of lines on the video.......I replaced the,,,,, 2.2 mic @ 50 volt cap in the middle of the main board on it and its still running.....but has about 3/8 of white traces following all the words on the desktop...[[[ anyone that knows this fix i would like to hear from ]]] ..........NOTE if you dont know about electronics...dont attemp any of this......their is a lot of voltage on the inverter board........my answer is that these monitors are JUNK...poorley built units.....
Posted on Oct 05, 2008
you're video card is failing, try the secondary port if you have one, artifacting such as different colors, shapes and lines are VGA related, you need a new VGA card and for more info contact http://tinyurl.com/m7ghqz
Posted on Jun 18, 2009
Go to the setup menu on the LCD panel by pressing button 1 on the front. See if there is an option to reset the lcd to factory settings. Reset it and report if it helps not.
Posted on Jul 29, 2009
I had the exact same problem. It's a bad capacitor on your power board. It's most likely the 1000uF 25v one towards the center of the board. I noticed it on mine because the top of the capacitor was pushed out more than usual and it has some residue, which are signs of a burnt out/bad capacitor. (WARNING: There is a risk of electric shock when opening the power supply unit. Leave the unit unplugged for at least a few hours before working on it. Proceed at own risk!) Read on for a fix:
1. In the back, remove the stand screw covers (x2) to access and remove the stand screws (x4).
2. There will be a single screw under where the stand was attached on the screen. Remove it.
The LCD/unit is sandwiched between the thin faceplate and back cover, which are held together by several clips:
3. Carefully pry and remove the faceplate with a flathead screwdriver or other flat tool.
4. There will be 2 screws holding the button circuit board in place. Remove the screws, unplug the small cable from the board, and remove the board.
5. There are a few clips towards the bottom that hold the back panel onto the LCD frame. Pick at those until you completely remove the LCD unit.
6. Remove the 4 side screws holding the LCD panel to the frame.
7. Carefully disconnect the 2 sets of wires and the single ribbon cable from the LCD panel, taking note of their direction.
8. Remove the 4 screws holding the large power control board in place, and disconnect the 2 cables connected to it (the smaller cable disconnects from the power control board, while the larger one disconnects from the other end).
9. Locate the faulty capacitor and take note of its direction/polarity (+ and -). Use a powerful soldering iron to remove it from the board. I say 'powerful' because I could not get the factory solder to melt with my Weller at full 850 degrees. If you can't get it unsoldered, you can CAREFULLY pry it off with some pliers. If the connectors remain attached on the board, pry them off as well.
10. Put in the new capacitor ($1.73 at Radio Shack), taking care not to bend or break the leads and taking note of its polarity. Trim the excess lead wire off and carefully solder into place.
To finish, follow steps in reverse 8 through 1. Plug it in and test. If all is good, it should remain on. You might hear a tiny high-pitched sound when there is no signal or screen is idle. This happens with mine, but should be no cause for concern.
Hope this helps and good luck!
Questions? Email me: [email protected]
Posted on Mar 10, 2010
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