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Topheron
MAME Fan
Reged: 06/06/12
Posts: 1
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Re: monitor
06/06/12 12:30 PM


Hey!

I've seen this one!

I'm an arcade tech that has been working on CRT monitors for about twenty years now.

Your problem is a small capacitor. Usually 3.3 or 4.7 uf 50v.

Capacitors can fail, (do fail) fresh from the manufacturer.

Randy Fromm's monitor flowcharts say "Is the picture distorted or curved" --> "Electrolytic Capacitor failure, this is the most common failure of all. It is best to replace all the Electrolytic Capacitors at this time"

He is right. Replacing all the Electrolytic Capacitors will solve this problem.

Interestingly, the black 'blob' with edges that fade away from the 'spot' will look the same without a signal applied. Turn up the 'screen' knob on the flyback until the entire screen looks grey with retrace lines and the 'blob' will be dark black.

It's a capacitor.







Entire thread
Subject Posted by Posted on
* monitor edcosta 04/01/12 04:29 AM
. * Re: monitor - RESOLVED! edcosta  06/28/12 09:22 PM
. * one question... italieAdministrator  06/29/12 05:06 AM
. * Re: one question... edcosta  06/29/12 04:27 PM
. * Re: one question... aavada  06/29/12 10:33 PM
. * Well, at the very least it gives me a chance to use this.... italieAdministrator  06/30/12 04:15 AM
. * Re: monitor Topheron  06/06/12 12:30 PM
. * Re: monitor edcosta  06/06/12 03:04 PM
. * Re: monitor grog  04/02/12 02:08 AM
. * Re: monitor italieAdministrator  04/02/12 12:38 AM
. * Re: monitor redk9258  04/01/12 05:02 AM
. * Re: monitor edcosta  04/01/12 05:20 AM
. * Re: monitor mogli  04/01/12 04:47 AM
. * Re: monitor edcosta  04/01/12 05:21 AM
. * Re: monitor mogli  04/05/12 09:08 PM
. * Re: monitor Garreth  04/25/12 02:03 PM
. * Re: monitor edcosta  04/26/12 05:27 AM
. * Re: monitor italieAdministrator  04/26/12 06:38 AM
. * Re: monitor Garreth  04/26/12 10:16 AM
. * Re: monitor italieAdministrator  04/26/12 02:05 PM
. * Re: monitor Garreth  04/26/12 02:22 PM
. * Re: monitor italieAdministrator  04/26/12 07:52 PM
. * Re: monitor edcosta  04/26/12 03:16 PM
. * Re: monitor R. Belmont  04/26/12 09:47 PM
. * Re: monitor Garreth  04/27/12 06:23 AM
. * Re: monitor italieAdministrator  04/27/12 12:36 PM
. * Re: monitor italieAdministrator  04/26/12 07:47 PM
. * Re: monitor edcosta  04/28/12 12:43 AM
. * Re: monitor italieAdministrator  04/28/12 05:26 AM
. * Re: monitor Garreth  04/30/12 01:56 PM
. * Re: monitor RetroRepair  04/30/12 06:44 PM
. * Re: monitor Garreth  05/01/12 11:56 AM
. * Re: monitor italieAdministrator  05/01/12 02:17 PM
. * Re: monitor Naoki  05/01/12 11:59 PM
. * Re: monitor redk9258  05/02/12 12:06 AM
. * Re: monitor Naoki  05/02/12 01:23 AM
. * Re: monitor italieAdministrator  05/02/12 04:50 AM
. * Re: monitor Garreth  05/02/12 02:30 PM
. * Re: monitor redk9258  05/02/12 11:11 PM
. * Re: monitor redk9258  05/01/12 11:52 PM
. * Re: monitor RetroRepair  04/28/12 06:32 PM
. * Re: monitor italieAdministrator  04/28/12 10:20 PM
. * Re: monitor RetroRepair  04/29/12 06:07 AM
. * Re: monitor italieAdministrator  04/29/12 07:14 AM
. * Re: monitor B2K24  04/28/12 02:57 AM

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