Sega Genesis Repair Question

[leo1798]

I recently bought a lot of old consoles, and some of the things included were two sega genesis 2's. One of them worked flawlessly and just needed to be cleaned, but the other has given me nothing but trouble. 

 

At first, it didn't consistently power on and didn't output a video signal (was detected by the display, however). I took it apart and cleaned it with some isopropyl alcohol - it now powered on and displayed with accurate sound, but not the video was nothing but artifacting. I tried cleaning the cartridge and cartridge slot, and when this still didn't work I tried resoldering the cartridge slot, display connector, and power connector. 

 

The video now seems to have more accurate colors and the sound works properly, but it is still an artifacted mess. The same cables, games, and TV work with the other genesis 2, so it has to be something with this console. I don't know if there's something I need to replace or what, so I was wondering if someone here would know or if someone could redirect me to a place that would. Thanks a bunch. Pictures of the PCB, display output, and whatnot are attached. 

 

 

[kelvinhall05]

Looks like bad RAM, not worth fixing imo.

[Helpful Tech Witch]

Bad ram/soc prob.

[Radium_Angel]

6 minutes ago, leo1798 said:

sega genesis 2

These are not PCs, and as such, the chips on the board are quite old, and replacement parts are going to be a trick.

Add to that, they went through several versions internally, so finding main chips to swap out may not even work, plus, I really hope you are good with a soldering iron.

 

Having said that, mainboards exist on ebay for cheap, if you wanna have a learning experience...

 

[leo1798]

26 minutes ago, Radium_Angel said:

These are not PCs, and as such, the chips on the board are quite old, and replacement parts are going to be a trick.

Add to that, they went through several versions internally, so finding main chips to swap out may not even work, plus, I really hope you are good with a soldering iron.

 

Having said that, mainboards exist on ebay for cheap, if you wanna have a learning experience...

 

Probably either going to sell this extra for parts or look into getting a new main board, thanks for the advice.