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Author Topic: Troubleshoot a monitor  (Read 1281 times)

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Alaska

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Troubleshoot a monitor
« 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.

menace

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Re: Troubleshoot a monitor
« Reply #1 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? 
its better to not post and be thought a fool, then to whip out your keyboard and remove all doubt...

baritonomarchetto

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Re: Troubleshoot a monitor
« Reply #2 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.

Alaska

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Re: Troubleshoot a monitor
« Reply #3 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 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