shmups.system11.org

Shmups Forum
 
* FAQ    * Search
 * Register  * Login 
It is currently Tue Nov 13, 2018 3:09 am View unanswered posts
View active topics



Post new topic Reply to topic  [ 4 posts ] 
Author Message
 Post subject: Sega Saturn - black screen
PostPosted: Wed Sep 12, 2018 1:34 pm 



Joined: 04 May 2015
Posts: 29
Hey Guys,

Got a Skeleton Saturn that unfortunately boots with a black screen. I tried without and with the battery, same. The TV detects the signal, however nothing appears. I'm thinking that the caps need to be replaced... here's a few shots of the PCB and the PSU - can anyone spot anything here? Doesn't look bad i think but I can't trace what's causing the problem.

https://imgur.com/a/OwrUoNG


Top
 Offline Profile  
 
 Post subject: Re: Sega Saturn - black screen
PostPosted: Wed Sep 12, 2018 5:28 pm 


User avatar

Joined: 25 Dec 2013
Posts: 563
Location: Indiana
bacardi wrote:
Hey Guys,

Got a Skeleton Saturn that unfortunately boots with a black screen. I tried without and with the battery, same. The TV detects the signal, however nothing appears. I'm thinking that the caps need to be replaced... here's a few shots of the PCB and the PSU - can anyone spot anything here? Doesn't look bad i think but I can't trace what's causing the problem.

https://imgur.com/a/OwrUoNG



So, I'd first verify the AV Connector is making good contact. Maybe the pin is bent/corroded. 100% verify you have a proper wire going to the saturn from the TV.

Now, I'd touch every IC in on the motherboard lightly with my finger to see if any are "hot". If something is hot, then something in that IC is shorted. (This is just a quick easy test)

Past this, you are going to need to start tracing back from the AV end and start inspecting voltages and signals with a scope. This will not be an easy task.


Top
 Offline Profile  
 
 Post subject: Re: Sega Saturn - black screen
PostPosted: Wed Sep 12, 2018 5:37 pm 


User avatar

Joined: 09 Aug 2017
Posts: 992
Location: Australia
If you have sound but no picture it should just be a cap replacement to fix.


Top
 Offline Profile  
 
 Post subject: Re: Sega Saturn - black screen
PostPosted: Sat Sep 15, 2018 12:57 am 


User avatar

Joined: 18 Feb 2015
Posts: 2113
Location: DFW area, Texas
Syntax wrote:
If you have sound but no picture it should just be a cap replacement to fix.


It can even get so bad with dried out caps that you get neither video NOR sound. I did a cap job for a fella that had both video and audio completely dead. Cap job fixed it. Seems a lot of these Saturn consoles are hitting the expiration date on the cap lifetime.
_________________
Web Site: http://www.firebrandx.com

Twitter: https://twitter.com/FBXGargoyle?lang=en


Top
 Offline Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4 posts ] 

All times are UTC


Who is online

Users browsing this forum: HalfCent, Pikkon, Sabin and 9 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
Space Pilot 3K template by Jakob Persson
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group