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Author Topic: Aristocrat MKV CRT Issue  (Read 706 times)

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Offline Hello1212

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Aristocrat MKV CRT Issue
« on: February 14, 2020, 03:03:53 AM »

Hi All,


Any suggestions on what the issue with this Chunghwa CRT is? It’s from a MKV 1997. Interesting that the settings buttons when pressed display the menu fine. I’ve taken it out, plugged it all back in, reseated RAM etc. but all the same.


Thanks!
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Offline Heihachi_73

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Re: Aristocrat MKV CRT Issue
« Reply #1 on: February 14, 2020, 03:16:08 AM »
Going by "DRAM Error!!" showing up in the self test, I doubt it's the monitor.
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Offline Hello1212

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Re: Aristocrat MKV CRT Issue
« Reply #2 on: February 14, 2020, 03:21:30 AM »
Thank you, agreed. Any troubleshooting suggestions?
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Offline rickhunter

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Re: Aristocrat MKV CRT Issue
« Reply #3 on: February 14, 2020, 07:36:26 AM »
The RAM on your MPU board has gone bad, that's why you are getting garbage when the system switches to graphics mode.  There's no troubleshooting, you already found out what is wrong. You need a working MPU board, ram can only be replaced if you get the exact part number and you are proficient at surface mount component replacement. The board are cheap enough where it is not worth paying someone to do it, not to mention you have to go and find a source for the RAM chips (which are probably obsolete and hard to source).
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Offline Heihachi_73

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Re: Aristocrat MKV CRT Issue
« Reply #4 on: February 14, 2020, 07:43:24 AM »
The DRAM chips are (AFAIK) standard 256Kx16 chips, although repairing surface-mounted stuff is generally a PITA without special equipment.
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