Help monitor Nanao MS-2932-S

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supermagoalex
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Help monitor Nanao MS-2932-S

Post by supermagoalex » April 7th, 2019, 11:55 am

Hello everyone,
I have an annoying interference problem with Nanao monitor of my Sega Naomi Universal Cab.
Immediately after switching on, white interferences appears, as you can see below.
If I disconnect and reconnect that cable on my hand, they sometimes disappear, but reappear after a few minutes.
When I disconnect the cable you can hear the sound of a switch in the background... what is it? (Degauss?)
What kind of problem is it? Is it solvable?
Thanks in advance for your help!


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Re: Help monitor Nanao MS-2932-S

Post by supermagoalex » April 11th, 2019, 6:20 pm

Hi again.. nobody can tell me how can I eliminate those white interferences? :(

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grantspain
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Re: Help monitor Nanao MS-2932-S

Post by grantspain » April 11th, 2019, 10:12 pm

I have no idea what you are doing, why are you shorting a cable?

What does it look like when a video signal is applied?

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Re: Help monitor Nanao MS-2932-S

Post by supermagoalex » April 11th, 2019, 10:58 pm

grantspain wrote:
April 11th, 2019, 10:12 MP
I have no idea what you are doing, why are you shorting a cable?

What does it look like when a video signal is applied?
It's the degauss switch.

When I turn on the pc inside of my Naomi cab, you see the game... but the interference remains in the background... maybe it's a mass problem?

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Re: Help monitor Nanao MS-2932-S

Post by grantspain » April 11th, 2019, 11:26 pm

likely an earth fault

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Re: Help monitor Nanao MS-2932-S

Post by supermagoalex » April 12th, 2019, 8:00 am

grantspain wrote:
April 11th, 2019, 11:26 MP
likely an earth fault
Yes.. I think so.. what can I check? :(

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Re: Help monitor Nanao MS-2932-S

Post by grantspain » April 12th, 2019, 8:42 am

check a different power supply, vga cable for a start

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Re: Help monitor Nanao MS-2932-S

Post by supermagoalex » April 22nd, 2019, 10:43 pm

grantspain wrote:
April 12th, 2019, 8:42 am
check a different power supply, vga cable for a start
Hi,
I found out that my monitor is a Nanao 2934-S.
I solved disconnecting CN901 cable on the board (DG IN), the interference has disappeared.
Could the monitor be damaged with this cable disconnected? :(

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Re: Help monitor Nanao MS-2932-S

Post by grantspain » April 23rd, 2019, 7:22 am

DG is degauss, it won't cause any issues being disconnected

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