Build Your Own Arcade Controls Forum

Main => Monitor/Video Forum => Topic started by: kardenm on March 26, 2010, 10:51:55 am

Title: WG 19K7203 no blue
Post by: kardenm on March 26, 2010, 10:51:55 am

I have a WG 19K7203 monitor.  Works great except suddenly lost all the blue. Blue pots on neck board look good. Any direction would be greatly appreciated.

Title: Re: WG 19K7203 no blue
Post by: Kevin Mullins on March 26, 2010, 11:05:58 am

Check the neckboard for bad solder joints.
Check the video input header pins for bad solder joints.

Title: Re: WG 19K7203 no blue
Post by: lilshawn on March 26, 2010, 11:54:43 am

sometimes the video amplifier goes south and acts like it's a dead transistor.

try swapping the color transistors around and see if the dead color moves to another color, if it does, it's a transistor, if it doesn't i'd suspect the video amp.

Title: Re: WG 19K7203 no blue
Post by: kardenm on March 26, 2010, 12:16:27 pm

Problem solved!  Blue transistor (Q805) on neck board was loose.  Resoldered and all is good again. Thanks so much (again) for all your help guys (or gals).  I'm sure I'll have another question for you soon.  :applaud: