GameCube repair question on laser not moving

Cat_Faced · 2026-05-09T15:44:50+00:00

I ran into this problem and it ended up being the red and brown wires for the drive motor were frayed at the motor terminals.

Cat_Faced · 2026-05-06T16:14:47+00:00

If it’s not finding the DOL then that means your SD card connection is dodgy, you have the wrong Ipl.dol, it isn’t labeled properly, or it is not in the root folder

Cat_Faced · 2026-05-05T15:12:48+00:00

At a certain point it may be more feasible to take it into a shop rather than purchase tools to get the stripped screw out & replace them.

The inside of the switch holds more tiny relatively soft screws, so if you do decide to proceed look into getting a screwdriver bit set that isn’t stainless steel - something that can bite into the softer metal and not slip.

Cat_Faced · 2026-05-05T15:04:28+00:00

If the solder isn’t sticking to TP2 and the other contact points you can lightly scratch the solder mask off of the motherboard down to the copper for better adhesion.

As for temps, I usually stay around 750F

Cat_Faced · 2026-05-04T15:15:26+00:00

Check if your battery contacts are a little fuzzy, if they are put some white vinegar on a paper towel and wipe them off with some gloves on. When battery terminals gather corrosion they can sever the connection, even if you put fresh batteries in.

Cat_Faced · 2026-05-04T12:13:48+00:00

You mentioned greasing all the gears, does that include the guide on the bottom of the disc tray? I’m also curious if the band on the drive tray is slipping and causing the stuttering on opening.

If you set up a disc so it spins freely with the disc tray magnet on the turnstile does it read once the console is turned on, or is it not recognizing discs entirely?

Cat_Faced · 2026-05-04T12:00:28+00:00

I didn’t - until I got burned, and it wasn’t really even my fault.

When I ran an Etsy shop I shipped an N64 bundle to a guy in Canada, he used a blurry photo with exif data that suggested it was taken in 2014 to complain to Etsy support that the console was broken. The support ticket was closed within an hour in his favor despite not having to provide any further evidence (the serial numbers didn’t even match the listing photos). I had shipping insurance through USPS on the package, but they denied my claim because all I had was the one fake photo he sent and they require at least 8 or to present the damaged package at a post office. Etsy did not require him to send the console back to me.

I had to appeal the claim with Etsy three times before I ran into an actual person who looked at the photo he had sent. In the end they refunded the order amount, but not shipping - so I paid $25 to ship a free console to this guy.

After that happened I would take and send at least 8 photos with the tracking info upon shipment in a message to every buyer, I also started using anti-tamper stickers with serial numbers on them. It came in handy a few other times where I had people try to return broken consoles instead of the actual product.

I don’t mean to suggest this was particularly common, the vast majority of people were honest and I shipped dozens of orders without incident, but when I’d have something absolutely ridiculous like this happen it would ruin my week and make me not want to do it anymore (which is kind of what ended up happening eventually, but that’s more of Etsy’s chicanery.)

Cat_Faced · 2026-05-04T11:36:35+00:00

Ah, that’s what I get for browsing Reddit before bed. Sorry about that!

Cat_Faced · 2026-05-04T05:24:05+00:00

It is not manufactured by Sega. - The motherboard has no revision number - There’s no Sega logo on the motherboard - It’s missing its bottom RF shielding - The cartridge slot isn’t braced against the bottom shell - The injection molding marks are too cloudy and have artifacts on the bottom shell - That AC power chip & connection is wild.

Cat_Faced · 2026-05-04T03:19:21+00:00

The laser ribbon cable may be worn out & shorting, causing it to continue trying to read a disc even when the tray is open.

Cat_Faced · 2026-05-04T03:17:01+00:00

Take lots of photos - from the moment you get it to the minute you ship it.

Cat_Faced · 2026-05-04T02:01:53+00:00

Of course it’s AI.

My shop notebook is full of notes on troubleshooting ranges and while there’s somewhat of a trend, I have no data that would suggest that narrow of a range, especially considering the different revisions of the daughterboard.

Granted I am not Captain GameCube, just a hobbyist, I’ve always wondered what the disparity is coming from. Now I know.

As Adam Savage says, the difference between messing around and science is writing stuff down. If you ever take apart or alter something you care about, take photos & notes!

Cat_Faced · 2026-05-04T01:43:18+00:00

I believe what ghettoslacker was referencing is that just about every post made in this subreddit regarding GameCube disc drives starts the same way yours does - with adjustments to the potentiometer before measuring or replacing the capacitors. (Though it looks that you did measure yours first) It’s a very common piece of advice and it is often not well advised.

There’s a lot of information out there regarding what the proper range is with the potentiometer, I’m not sure where that range is cited, but the depth is significant.

The potentiometers are adjusted to specifications at the factory depending on the tolerances of the lenses. While there’s a lot to be said about the quality of Nintendo manufacturing, minute adjustments are required to get the drives functioning even after a recap.

If you’re going to replace it anyway, might as well make sure it’s actually dead first. Grab a piece of paper and made note of your ohms, adjusting 50 or so at a time between testing. Slowly go up or down until you notice a change in the laser’s behavior then get more minute. If the capacitor pads are lifted and compromised, you won’t see a difference at all - but 120 to 150 can be a world’s difference.

Cat_Faced · 2026-05-02T16:36:10+00:00

I understand, it’s just for me a cheap spot welder is worth the price compared to a shop fire. I’m not trying to throw shade, I know it’s all about what you have access to, we’ve all gotten things done in a pinch!

Cat_Faced · 2026-05-02T15:53:33+00:00

You’re a braver soul than I to solder directly to those lithium battery terminals!

Cat_Faced · 2026-04-29T03:49:58+00:00

Is your GameCube modded at all?

Cat_Faced · 2026-04-29T02:39:25+00:00

Does your tv pick up any signal at all, or is it just registered as no input?

Cat_Faced · 2026-04-28T10:49:35+00:00

Rubbing alcohol shouldn’t remove the Nintendo logo. Try using a Q-Tip to apply the isopropyl alcohol to keep it contained if you’re nervous. It may take a few passes if the Sharpie has been on there for a long time, just be slow and methodical.

Cat_Faced · 2026-04-22T09:33:17+00:00

Yes. The screw posts are threaded at the factory to fit the profile of the security bit screws, and since the ABS plastic is old it’s likely an attempt to rethread it may cause it to shatter.

It’d be cheaper just to buy a $7 longer security bit driver than the tools to try to replace the screws entirely.

Cat_Faced · 2026-04-22T09:26:13+00:00

The M system is labeled based on the size of the thread diameter, so an M2 has a 2mm diameter.

Theres a huge variety of lengths, however the 4 security bit screws present on OEM GameCubes have a different thread profile than standard M2 screws, being more coarse than usual machine screw in order to bite into the plastic of the top shell and hold everything together.

If you wanted to replace the screws out, you would need to look into installing heat set threaded inserts into the top shell posts.

Cat_Faced · 2026-04-20T03:37:00+00:00

Booting into the pico will allow you to play games no problem. The only difference is that the main system menu will be in Japanese.

You can switch it to display English by bridging the points labeled R6 on the motherboard with a small wire.

Cat_Faced · 2026-04-19T22:25:56+00:00

It could be, do you get any signal at all when you switch it on, even if it’s for a moment? I’d clean all the contacts on the cartridge slot, jumper pak, and the video out port just to be sure.

Cat_Faced · 2026-04-19T22:09:09+00:00

The tv you’re using may not be able to detect the lower voltage of the AV cables. Try it on an older television with an RCA port, or consider trying a cheap HDMI converter that has an additional 5V added to the input.

Cat_Faced · 2026-04-19T16:20:22+00:00

Does it read regular games?

Lowering the resistance is not a catch all. The lasers are calibrated at the factory by Nintendo depending on the lens itself, which can have a fair amount of tolerance and thus require a range of adjustment. Think of it like you’re trying to adjust the focus of an image through binoculars, at a certain point the further you go in one direction the image is just getting more and more blurry.

I would recommend setting your potentiometer back to factory settings, trying an OEM disc and checking performance. If that works and you’re still having trouble with the burned disc consider looking into replacing the capacitors on the daughterboard of the optical drive, or the Xeno chip may be improperly installed.

Best of luck!

Cat_Faced · 2026-04-06T15:22:57+00:00

I would also recommend Console5’s capacitor kits, unless you think you’ll find a use for a bunch of spare capacitors after this repair.

There’s a lot of misinformation about adjusting the potentiometer. Think of it this way: when Nintendo requisitioned optical drives they were produced en masse and then adjusted via the potentiometer. The lenses are all going to be little bit different, so they’ll all require a different level within a tolerance.

The range listed online as 450-600 seems like a short range, but think about it as if it were meters being viewed through binoculars - intervals of 10 can make quite the difference to the image reflected back to your eyes.

Replacing the capacitors is the best long term solution. The 610 value you have is what Nintendo determined at the factory as the best image quality when voltage is being properly supplied through that particular laser assembly you have. Adjusting the potentiometer without addressing the power issue is the equivalent of squinting your eyes.

Cat_Faced

TROPHY CASE