Question about AOC CT720G 17" CRT Monitor

1 Answer

Crt monitor video chroma processing

I think my monitor has a loose parts in video chroma processing parts. can you kindly advice me what part will i check?

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 348 Answers

First you check the signal cable continuty by multimeter then correct it if faulty .if ok then give -ve click at red cathode on crt base in on condition if red raster comes on screen then red cathode is ok same thing for green and blue cathode if green cathode do not shows green raster after -ve click then crt is faulty then give -ve click at R point at color raster ic which has heat sink if red color comes then ic is ok same thing for green and blue if ic is faulty then replace it if not then check bipolar capacitor if faulty then replace it

Posted on Oct 30, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

When I start it the picture is green


loose contact at the chroma board, it was a small board hook up at the picture tube. tried to re soldered component parts here usually drive transistor for color.

Oct 27, 2012 | Philips Brilliance 107 17 in. CRT Monitor

1 Answer

Acer monitor colour turn green


That is color problem may be the vga cable is intermittent or loose the solder of some components around chroma or color ic has defective. But if you are electronics repairman resolder first the chroma w/ sodering iron before you suspect the color ic.

Oct 02, 2010 | Computer Monitors

1 Answer

My monitor goes green , and when i hit it at the back it again comes to its normal color how to make it plzzzzzzzzzz help meee


That is cold solder problem only, sometimes in a long time run the monitors has encountered intermittent or loose that is common. The solutions for that check the vga cable, open the monitor & look the color or chroma section for loose & dried joint pins, resolder it or resolder entire chroma for sure.

Sep 29, 2010 | Computer Monitors

2 Answers

ADI GD-166G SCREEN HAS GREEN COLOUR DISPLAY


hope u r a professional..as u r handling chip-level repairing of monitor, knowing itz hazardous n dangerous..

however, check thoroughly for dry soulderings..(esp. at the crt base)..[this chance is maximum]..
see if the base is loose or faulty..
yes, it can b the 'chroma ic'..but don't ignore the associated components..(esp around the base)..
check video amplifier n sub section..
the colour diodes, transistors n resistances at the base..

for better supervision contact ur system admin/vendor....

Nov 11, 2009 | ADI Corporation MicroScan 5P (White) 17"...

3 Answers

700e Lg crt monitor problam power on eht on but not display


The normal crt monitor have a demo display when you unplug the vga cable to PC like this image below.. fd6b6b9.jpg
Note:
If the crt monitor green LED light steady and heater beam have light, the horinzontal and High Voltage supplied to tube is completely good. If you encountered this problem just focus on video section of crt monitor. But before you start... find the flyback transformer behind this they have two controls screen & focus. After you found it plugin the monitor use plastic precision or small screw philip driver for safety to high voltage at horizontal area choose screen control rotate it to clockwise direction follow this....
5b5166c.jpg If the display responses or from dim to lighter 100% you have a problem to ABL find this at the bottom of horinzontal section near at flyback transformer pins trace the line of ABL for dried solder, open resistor if nothing happen find the Video IC at chroma section and replace it. follow this...
3c6e89c.jpg For LG & Redfox you found LM1269NA Visit this site for seaching semiconductor matches www.alldatasheet.com Good luck.

Check this site for searching semiconductor
www.alldatasheet.com

Aug 12, 2009 | LG Studioworks 700S 17" CRT Monitor

2 Answers

Audio ok, no video


I’ve never seen this kind of video output caused by a bad video cable or bad FL inverter board. it was fixed after I replaced the monitor

Apr 03, 2009 | LG Flatron F700B 17" CRT Monitor

1 Answer

Samsung 931b Monitor is red


loose CRT board solder or chroma ic and transistors problems..

Mar 09, 2009 | Computer Monitors

4 Answers

Monitor dispaly problem


I think this problem appear video o/p section.Dry solder Pl. solder video output section

Jun 01, 2008 | LG Computer Monitors

1 Answer

Compaq 7540 colour looses red color


check the pin # 1 of video input cable { broken or Bent }
if it is ok then there must be a problem with the cable or RGB Processing Circuit { Normally Dry Soldering of a faulty IC in the circuit of CRT BASE} .

Mar 09, 2008 | Compaq CV 7500 17" CRT Monitor

1 Answer

BLANK SCREEN


screen goes dark I tried the moniter in a different pc with the same result. i think there might be problem in monitor adjustment. 2 if it is ok then the problem in video section. 3 also check for loose connector 4 crt base might be loose.

Sep 26, 2007 | Dell E773C 17" CRT Monitor

Not finding what you are looking for?
AOC CT720G 17" CRT Monitor Logo

Related Topics:

116 people viewed this question

Ask a Question

Usually answered in minutes!

Top AOC Computer Monitors Experts

Les Dickinson
Les Dickinson

Level 3 Expert

18298 Answers

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

Shahzad  Waseem...
Shahzad Waseem...

Level 3 Expert

746 Answers

Are you an AOC Computer Monitor Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...