ms pac scramble screen question

djdaveofkc

Active member
Joined
Aug 9, 2008
Messages
1,091
Reaction score
12
Location
Gardner, Kansas
Hi, i'll try and take a pic later if it will help but i got a ms pacman for cheap and it supposidly only needed a board as the screen is scrambled. You can hear the game work fine. I swapped the game board to one i know works and same thing so it's not the board. After plugging it in the next day i had a normal pic except one side was kinda collapsed about 3/4 over on the screen. I unplugged it and it did the same thing back to the scramble. Possible edge connector, power supply? not sure what to check at this point as i know it's not the board. Thanks
 
Sounds like a monitor issue...
Could be not synced up right? Hard to say with out a pic.....
Also take a pic of the monitor chassis so we know what kind of monitor we have here.
 
updated pics

updated with pics of monitor and screen scramble
 

Attachments

  • 2011-03-03_21_14_16.jpg
    2011-03-03_21_14_16.jpg
    37 KB · Views: 25
  • 2011-03-03_21_16_05.jpg
    2011-03-03_21_16_05.jpg
    86.8 KB · Views: 20
  • 2011-03-03_21_17_34.jpg
    2011-03-03_21_17_34.jpg
    87.1 KB · Views: 13
  • 2011-03-03_21_17_57.jpg
    2011-03-03_21_17_57.jpg
    88.7 KB · Views: 17
  • 2011-03-03_21_18_12.jpg
    2011-03-03_21_18_12.jpg
    12.2 KB · Views: 11
Since it's a monitor issue the thread is getting moved.

Also, on that monitor you have, you'll want to check the solder joints on the daughter cards and on the pins on the monitor chassis. They tend to crack and cause issues.

RJ
 
It's most likely a monitor issue (especially since the monitor really needs to be recapped and reflowed), but I have seen a similar looking pic once that turned out to be a problem with the socket on the VRAM addresser of all things. Luckily, I already knew the test monitor was okay, and was able to focus elsewhere...
 
Last edited:
New pic and 90% success

Well you guys rock, the horizontal adj got it. It was hid and i didn't see the rascal. turned it to the right and walla picture normal. One thing left, i have a slight screen going up on the right, it's not terrible but notice the tunnel in the picture. Is this a adjustment or caps? thanks
 

Attachments

  • 2011-03-05_13_30_02.jpg
    2011-03-05_13_30_02.jpg
    11.4 KB · Views: 5
Can you fiddle with that horiz adj pot a little to make it better or worse?

Even caps might not make it go away completely, but you may find your adjustment window very narrow until those caps are replaced...
 
Back
Top Bottom