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Main => Monitor/Video Forum => Topic started by: Alaska on October 25, 2015, 02:09:52 pm

Title: Troubleshoot a monitor
Post by: Alaska on October 25, 2015, 02:09:52 pm

I just purchased an arcade that I plan to turn into a MAME. I have been wanting to do this for a LONG time, but am new at this and had a few questions. The original game (Hit The Ice by Williams) does not work properly. When I turn on the game to test the monitor, the monitor sounds like it is powering up, flashes a bit of snow in the upper left corner but never turns on. I can hear a slight hum coming out of the speaker, but no other sound is heard. I took a look at the wiring and everything is plugged in.

Currently I am thinking that the actual game board might be shot, which is fine because I am going to add a PC and replace all controls. I would love to keep the existing monitor. I live in Alaska and shipping is outrageous, and there isn't much of a local market for used parts. The monitor appears to be:
* Size: 25"
* CRT: Color CGA
* Model : Possibly a Wells Gardner. The only markings I can see state that it is manufactured by Zenith
* Picture Tube: G-A63ADG25X
* Other info: 04RC0105-005
* Serial number: 216753

What can I do to troubleshoot the monitor to make sure it is functional? Any thoughts on the issues with the original game?

Many thanks!

Side note: I feel comfortable working with electronics and discharging the monitor.

Title: Re: Troubleshoot a monitor
Post by: menace on October 25, 2015, 05:20:30 pm

Would need a picture of the chassis to know what monitor you have before you could do any troubleshooting...

Is the neck glowing on the monitor? 

Title: Re: Troubleshoot a monitor
Post by: baritonomarchetto on October 26, 2015, 01:51:00 am

A pic of the chassis would help a lot, yes.
To identify if the issue is due to the monitor or pcb (or both) you should disconnect the game pcb, turn the monitor on, rise the screen pot a little (generally it's placed on the flyback) and look at the pic: if you have a well shaped white/grey raster your monitor is very likely good.

Title: Re: Troubleshoot a monitor
Post by: Alaska on October 29, 2015, 07:11:19 pm

Apologies. I started to troubleshoot and reposted here http://forum.arcadecontrols.com/index.php/topic,148062.0.html (http://forum.arcadecontrols.com/index.php/topic,148062.0.html) under the Topic "WG 25" K7000 issues - AC Voltage 136.0V"

-baritonomarchetto- I will try that out and repost in the above section.

-menace- The neck does not appear to be glowing on the monitor