iFixit - Answers With Device "Sega Genesis II"

Sega Genesis II: Sega Genesis Power button

Thu, 18 Jan 2018 09:20:09 -0700

How do I fix the power button on my sega genesis model II that wont stay activated? Currently have to wedge a small flathead screw driver inbetween the button to have the system stay on.

Sega Genesis II: Sega Genesis Controller port does not work

Wed, 29 Jan 2020 12:56:30 -0700

My Sega Genesis 2 second controller port is not working at all, I’ve tried desoldering and soldering the port a couple times. I’ve also reflowed everything on the back of the board and checked continuity from where the controller plugs in to the resisters just in front of where the pins solder to the motherboard. The weird part is in sonic 2 and 3 it actually does kinda work but then gets stuck going left. What can I do that I haven’t already?

⟐ Answered January 29, 2020 at 12:56 MST

Sega Genesis II: Why is my Sega turing on but not showing anything

Thu, 12 Mar 2026 18:06:13 -0700

Its turning on and everything but when you get it all set up there is no picture

⟐ Commented March 12, 2026 at 18:06 MST

Sega Genesis II: Sega Genesis 2 will not boot, even though the power light comes on

Tue, 17 Aug 2021 20:14:26 -0700

My system worked fine recently, but today I powered it up and the BIOS screen wouldn’t show up. I disassembled the system, and all the inputs seemed to be soldered correctly. Is there something I might have overlooked, or might it be something related to the A/V cable? (The cable is an RF modulator cable, by the way.)

⟐ Commented August 17, 2021 at 20:14 MST

Sega Genesis II: Genesis will turn on screen flickers but no sound or video

Sat, 08 Jul 2017 06:56:17 -0700

I just bought new av cables for my Genesis I get home and I can't find my Genesis so I go out to my buddy's he has a Genesis he sells me well it powers on but no sound or video I also stopped at my local exchange store bought new av cables that connect into back of tv red white yellow plug them in no picture or sound flicker once just a little what's wrong

⟐ Answered July 08, 2017 at 6:56 MST

Sega Genesis II: Sega Genesis II won't turn on

Fri, 03 Jun 2022 20:34:35 -0700

Hey Guys,

My Sega Genesis II won’t turn on, I used a digital multimeter to test the regulator, and is not receiving any power on the input

Can you guys help me out finding the solution for this?

And sorry for my bad english, I’m from Brazil. =\

⟐ Answer edited June 03, 2022 at 20:34 MST

Sega Genesis II: My Sega Genesis II wont stay on

Mon, 23 May 2022 09:08:40 -0700

If i move the power supply cord it turns off and i have to run the power cord under the console for it to stay on

⟐ Answer accepted May 23, 2022 at 9:08 MST

Sega Genesis II: Turns on, gets to the Copyright screen, then goes black and beeps.

Sun, 29 Aug 2021 17:58:49 -0700

I have a Sega Genesis II that when turned on will do it’s normal thing with the copyright screen, but then goes completely black no matter the game and beeps. It seems the amount of beeps changes between games. For example, if I put in Sonic 2, it never seems to stop beeping, but then on the contrary, if I put in Sonic Spinball it beeps like 2-3 times. Does anyone know what this issue could be? Thanks.

⟐ Answered August 29, 2021 at 17:58 MST

Sega Genesis II: My genisis turns on but it wont on my tv

Sat, 01 Dec 2018 09:56:51 -0700

so I looked at my TV out cord and its broken if anybody knows where to get one Please tell me. Thank you so much

⟐ Answer accepted December 01, 2018 at 9:56 MST

Sega Genesis II: all games apear in black and white despite using multiple av wires

Thu, 20 Mar 2025 07:00:53 -0700

so I bought a Sega Genesis II from ebay it's in mostly working condition but every game cartridge I've tried plays in black and white

Sega Genesis II: Video output not working

Sun, 16 Mar 2025 09:08:18 -0700

My Sega will boot up and provide sound but no picture. Anyone with a guide to fix?

Sega Genesis II: Sega Genesis won’t show on tv.

Thu, 09 Mar 2023 12:21:15 -0700

I’ve used this Genesis on this same tv about 2 years ago using the rf unit with no issues. I wanted to see if my daughter would be interested so got it out again but the video was mostly static. I bought an rca cord for it and tried again today but just getting a black screen with a kind of humming noise. Took the unit apart to clean but didn’t see any signs of damage.

I tried to attach a video of each cord. The static one is using the rf cable and the black screen is rca. Any advice would be appreciated.

Sega Genesis II: No sound from my Genesis II

Fri, 05 Aug 2022 07:16:56 -0700

How do I restore the audio to my Model II Genesis? It’s has no audio at all. Power and video work just fine but it has absolutely no audio.

⟐ Answer deleted August 05, 2022 at 7:16 MST