Unreleased console from the big THREE

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There is less than 5 of these known to exist, and we have the chance to secure one and document it on our new channel.

All data/software found on the system will be shared with researchers, but donators will get first access. High res 4k video will be done on the device and it's internals for future reference.

This fundraiser is time sensitive.
Goal
£2,000.00
Received
£2,071.00
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Gameboy DMG-01 broken L channel

gorgyrip

Well-known member
Original poster
Registered
Jun 17, 2019
49
12
8
AGName
gorgyrip
AG Join Date
26 octomber 2007
The Right channel is working fine. On the LEFT channel i can only hear very faded the gameboy logo and after that the Left channel outputs some noise, and the noise has the right volume. The same happens for the internal speaker and also for the headphones.
I've attached a schematic for the sound I found online.
Here are the things I tried:
1. I made sure the small sound board is working. I replaced the 2 x 100uf caps. I even swapped channels to make sure the board is working.
2. I checked the volume pot, I even bypass it with wires. So now I have full volume.
3. I checked the 2 caps and 2 resistors on the CPU sound output. They are good. I even swapped them between channel and no difference.
4. Now the interesting part. If I remove C4 (cutting the LEFT channel), the right channel is still working fine. But if I cut the Right channel, the Left channel has only noise (no longer the gameboy logo sound followed by noise).
5. I swapped channels before going inside the amp just to make sure the amp is working. The original left channel still has the same problem.
6. At this moment I believed there's something wrong with the CPU. So I replaced the CPU (from an untested gameboy). SAME PROBLEM.

Am I missing something or I am just unlucky and have 2 damaged CPUs?
 

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Tokimemofan

Well-known member
Registered
May 30, 2019
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29
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Try lifting both pins on the cpu and with a game running connect them with a needle 1 at a time to the working channel, I wouldn’t be surprised if there is a bad trace.
 

gorgyrip

Well-known member
Original poster
Registered
Jun 17, 2019
49
12
8
AGName
gorgyrip
AG Join Date
26 octomber 2007
I've tried to swap the pins on the cpu. The pin for the Left channel still has only noise in zelda.
SOLVED. Shortcut between RD and L channel.
 
Last edited:

Unreleased console from the big THREE

We're urgently fundraising for an unreleased games console from the big three game companies.

There is less than 5 of these known to exist, and we have the chance to secure one and document it on our new channel.

All data/software found on the system will be shared with researchers, but donators will get first access. High res 4k video will be done on the device and it's internals for future reference.

This fundraiser is time sensitive.
Goal
£2,000.00
Received
£2,071.00