John's Arcade Forum - Classic Arcade and Pinball Collecting and Restoring Discussion Forum - RETRO MAME - Nintendo Vs Forum
November 21, 2024, 04:24:12 am *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Welcome to the John's Arcade Forum. Glad you made it! Smiley
 
   Home   Help Search Calendar Login Register  
Pages: [1]
  Print  
Author Topic: K4900 help needed  (Read 3621 times)
0 Members and 1 Guest are viewing this topic.
Onjisan
Newbie
*
Offline Offline

Posts: 2


View Profile
« on: October 10, 2021, 09:32:54 am »

Hey guys. New to the hobby, but have been subbed here forever.

I picked up my 1st game. A Robotron that's been put into a moon patrol cabinet. It was not working initially.
So far I've replaced the power supply (it was converted to switching)
It had a bad ram chip, so I had to replace one of the 4116's and now its booting without error, and I can hear the initial startup sound.

My issue is that I have nothing on the screen. Well I have something its a lightblue'ish screen with some diagonal lines (pics attached)

I do have a cap kit on the way, but I'm just wondering if that's going to even help with this specific issue.

I'm hoping someone here recognizes this specific screen.

I do have a thread on KLOV going as well, but I thought I would post here as well since you're all bro's lol
thanks





« Last Edit: October 10, 2021, 09:36:37 am by Onjisan » Logged
Onjisan
Newbie
*
Offline Offline

Posts: 2


View Profile
« Reply #1 on: October 16, 2021, 01:58:24 pm »

Well ok then. Think I stumped everyone

I did go ahead and send the chassis off for repair
Logged
Pages: [1]
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Install Simple Machines Forum Valid XHTML 1.0! Valid CSS!