Author Topic: new monitor problems!!!!!! (Read 4172 times)

_JMFR · « **on:** April 11, 2009, 12:05:16 am »

ill spare some details

i installed my new monitor and when powered up, there are slanted lines running from corner to corner

its got to be an ac problem of sum kind

any thoughts??

Kevin Mullins · « **Reply #1 on:** April 11, 2009, 01:21:29 am »

Thin lines about an inch or so apart all across the screen diagonally?

Got a pic?

_JMFR · « **Reply #2 on:** April 11, 2009, 01:40:15 am »

Quote from: Kevin Mullins on April 11, 2009, 01:21:29 am

Thin lines about an inch or so apart all across the screen diagonally?

Got a pic?

here you go

_JMFR · « **Reply #3 on:** April 11, 2009, 10:46:43 am »

heres another pic. Notice the random color dots at the bottom of the screen. This is really bothering me. someone please help me!!!

XeviouS · « **Reply #4 on:** April 11, 2009, 11:15:39 am »

Plug it in to a different computer and see if it still does it. If it does then you've got a dodgy monitor and you should take it back.

_JMFR · « **Reply #5 on:** April 11, 2009, 12:10:02 pm »

its not a mamed arcade....its runnin off a 60-1 board.

CheffoJeffo · « **Reply #6 on:** April 11, 2009, 02:51:48 pm »

Same advice -- plug in a different board.

_JMFR · « **Reply #7 on:** April 11, 2009, 08:54:43 pm »

something must have happened when i changed the monitor frames. it looked just fine when i plugged it up in the old frame. and when i changed it over, it looked fine to. DAMNIT!!!

_JMFR · « **Reply #8 on:** April 12, 2009, 12:18:45 am »

after plugging up my umk3 board, still does the same thing. i geuss the thing is coming out. are there any techs out there that may know whats causing the problem? any advicewould be great.

i would return it, but its not in the original frame.

grantspain · « **Reply #9 on:** April 12, 2009, 06:38:43 am »

looks like a grounding issue to me

Kevin Mullins · « **Reply #10 on:** April 12, 2009, 02:35:16 pm »

Quote from: grantspain on April 12, 2009, 06:38:43 am

looks like a grounding issue to me

That's my initial though as well after seeing the pics.

Check all grounding cables.

Is there any kind of power supply or transformer that may be too close?
(not sure how your cab is setup)

_JMFR · « **Reply #11 on:** April 13, 2009, 01:20:41 am »

i got the main ac line running into my cabinet. the pos/neg runs to the one/off switch and the ground runs to an outlet along with pos/neg after the switch. the monitor is plugged into the outlet, as well as another ac line that runs to power supply for the jamma board. the only thing that may be causing the problem is the grounding that runs along the corners of the monitor chassis. the 2 wires that connect the chassis grounds to the monitors pcb were to short when i mounted everything in the cabinets old, original chassis, so i had to extend them. the wires that connect to the pcb were a silver color, where as the wire i used to extend them were a brass color. Could this cause a problem?

grantspain · « **Reply #12 on:** April 13, 2009, 01:13:33 pm »

be good if you could post a photo of what you have done

reko19 · « **Reply #13 on:** April 13, 2009, 02:04:26 pm »

did you try adjusting monitor Horizontal Hold?

The reason I mentioned it is because it did not look like random pixels. looks like there is a pattern at 45 degree.

_JMFR · « **Reply #14 on:** April 13, 2009, 02:46:40 pm »

Quote from: reko19 on April 13, 2009, 02:04:26 pm

did you try adjusting monitor Horizontal Hold?

no. i didnt know that would cause the random skrewed up pixels at the top and bottom of the screen

Kevin Mullins · « **Reply #15 on:** April 13, 2009, 02:54:10 pm »

Quote from: _JMFR on April 13, 2009, 02:46:40 pm

no. i didnt know that would cause the random skrewed up pixels at the top and bottom of the screen

That particular issue is hard to tell what's going on from just that one pic. Can't see it in the first ones. Almost looks like a tube convergence type thing, but wouldn't know why it's just those specific spots.

Is it there for all the games?

_JMFR · « **Reply #16 on:** April 13, 2009, 03:14:33 pm »

Quote from: Kevin Mullins on April 13, 2009, 02:54:10 pm

Is it there for all the games?
[/quote]

yes. some worse than others

_JMFR · « **Reply #17 on:** April 13, 2009, 03:17:23 pm »

Quote from: grantspain on April 13, 2009, 01:13:33 pm

be good if you could post a photo of what you have done

ill post another pic when i get back home. Im out of town all week

thanks for all the advice everyone. All you guys are the reason i can put these things together

grbgemen · « **Reply #18 on:** April 13, 2009, 05:10:51 pm »

Cant those diagonal lines happen if the screen setting is to high on the back of the flyback? or the brightness?

Kevin Mullins · « **Reply #19 on:** April 14, 2009, 01:22:38 am »

Quote from: grbgemen on April 13, 2009, 05:10:51 pm

Cant those diagonal lines happen if the screen setting is to high on the back of the flyback?

Those lines would be very thin, almost drawn lines equally spaced apart.

He has more of what some might call a "jailbar" effect going on from the looks of it.

_JMFR · « **Reply #20 on:** April 18, 2009, 04:55:40 pm »

well, i managed to get rid of the lines, but those damn messed up pixels are still poping up at the top and bottom of the screen!

also, after being on for about 10 mins, the monitor goes blank. IDEAS?!?

SirPeale · « **Reply #21 on:** April 18, 2009, 06:02:57 pm »

Board issue.

qrz · « **Reply #22 on:** April 18, 2009, 10:46:58 pm »

if indeed a thermal issue, i suggest technician in a can (freeze spray) to aid in locating the culprit .
( but, use with caution in high humidity conditions)

most properly functioning semiconductor circuits will not have a reaction to a temperature change .
what you will look for is ANY change, wether good or bad . then have a closer look at that circuit/device

NEVER USE FREEZE SPRAY ON A CRT

thermal shock on hot glass WILL cause it to break

qrz


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