iFixit - Answers With Device "Sega Master System"

Sega Master System: Button 2 on controller port 1 not working

Mon, 10 Jan 2022 15:12:15 -0700

Hi there! I have a NTSC (USA) Master System and button 2 is not working on controller port 1. I have two original controllers and both work perfectly when connected to controller port 2, but if I connect to port 1, button 2 won’t work. I tried resoldering all 9 pins for controller port 1, but problem persists. Any idea what might be wrong? Thank you!

⟐ Commented January 10, 2022 at 15:12 MST

Sega Master System: Controlllers will not start the game

Sat, 15 Aug 2020 04:08:38 -0700

Hi, the system powers up and displays the game but the game does not start when I hit the start button on the controller. Thank you

⟐ Answered August 15, 2020 at 4:08 MST

Sega Master System: Sega master system mk1.

Sat, 02 Nov 2019 21:47:34 -0700

I own multiple sega master systems , all great condition but in a postion where i can only keep one. My spanish bought model is the best condition but am concerned a uk power adapter will blow it.

Living in the uk will my spanish bought sega master system be safe using a uk version psu?

Thanks in advance.

⟐ Edited November 02, 2019 at 21:47 MST

Sega Master System: Can I use uk psu on canadian sms?

Sat, 02 Nov 2019 13:15:07 -0700

Im based in the uk, can i use a uk sega master system psu on a french sega master system?

⟐ Commented November 02, 2019 at 13:15 MST

Sega Master System: Sega Master System Audio/Video Problem

Thu, 18 Apr 2019 13:29:44 -0700

My SEGA Master System has a audio/video problem, that always requires consistent fiddling around with the audio/video cables/connectors both on the television and the game console itself. What should I do?

⟐ Commented April 18, 2019 at 13:29 MST

Sega Master System: Sega Master System Power Supply

Thu, 09 Nov 2017 00:07:44 -0700

I wanted to ask what kind of power supply does a SMS use? AC/DC? 9-12V? Does Sega Mark III and SMS Model 1 & 2 have the same Power Supplies?

⟐ Commented November 09, 2017 at 0:07 MST

Sega Master System: Powers on but won’t read games.

Tue, 24 Feb 2026 21:55:05 -0700

System powers on but won’t read games from cartridge.

Sega Master System: Why is my output an incorrect display color?

Sat, 10 Jan 2026 08:02:44 -0700

Why would my console display a green output color where there should be white? The result is the same weather using the RF port or the composite ports and I noted the saturation will change from time to time but never to the point that it is the proper white output.

Sega Master System: Fixing a Sega Master System game

Tue, 07 Feb 2023 17:30:20 -0700

Hello,

I been trying to get a Sega Master System game to work called R-type. Unfortunately I haven't had any success and believe that its the chips itself having problems. I then discovered a video on youtube based on fixing Sega Genesis games that testing pins of the chip using the diode mode on a multimeter, from ground to the pin, and if I had one pin from the chip that doesn't allow any current, to solder a 1k resistor to complete the circuit from the pin and ground. I tested that on a genesis game that had the same problem, and it works!

Video here: https://www.youtube.com/watch?v=eCT4ZKV2...

My question is, is that possible to do the same technique with a Sega master system game? If so, what resistor should I use?

Sega Master System: Power Converter and Supply

Wed, 18 Nov 2020 09:56:16 -0700

I tried to fix my Sega Master System myself but failed. I took out the Power Converter and the hole you plug the power supply into. I really wan’t to get it fixed but I can’t find the parts anywhere because I don’t know the names really. Do you know what I need?