In this video I clean and fix a Sega Genesis Model 2 (similar to the Mega Drive II). The A/V port is destroyed, and the expansion port cover is missing.
Unlike the original Genesis which uses a center-negative power plug, the Model 2 is 10v DC, center-negative. When I first plugged it in, nothing happened.
The inside of the machine was a little dirty, but not too bad for such an old console. I cleaned up the main board with isopropyl alcohol. Then I sprayed some DeoxIT into the power jack to see if I could revive it, but it didn't work. Pressing lightly on the power cord caused the power to cut in and out intermittently, so I reflowed the solder on the jack, but that was also ineffective. Finally, after removing, disassembling, and thoroughly cleaning the jack, it worked.
To remove the A/V port, I applied a bunch of Chip Quik low-temperature solder, but it didn't help much. I ended up cutting the already broken port into small pieces with flush cutters. I found a new port online for a good price.
I cleaned the console shell with soap and water and sprayed DeoxIT in the cartridge port. After reassembling the whole thing, I 3D printed a replacement expansion port cover that I found on Thingiverse.
Parts used in this video:
A/V port replacement: console5.com/store/sega-genes...
Power supply: www.amazon.com/gp/product/B08...
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00:00 Intro
00:51 Disassembly
02:21 Board Cleaning
03:22 Power Jack Fix
05:22 A/V Port Replacement
06:59 Continuing Disassembly
08:00 Shell Cleaning
09:08 Reassembly
11:11 Port Cover Replacement
12:41 Reveal
12:55 Test
14:35 Ending