Red light, no picture or sound

Question

Game Boy

The Game Boy released on April 21, 1989 in Japan, followed by North America on July 31, 1989, and lastly in Europe on September 28, 1990. It is characterized by a large grey casing and model number DMG-01.

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LeeUK @leeuk

Rep: 13

2

Postado: 3 de jul de 2024

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Red light, no picture or sound

Hi,

Iv purchaced a gameboy that has power to the led but no picture or sound.

Iv tested the output from the battery and its outputting 6.4v.

Psu points are

Vcc 6.26v

Gnd 0

Minus -276mv

Plus -151mv

Now i no these outputs are wrong but im getting 6.24v on the board up by the switch when its turned on.

Strangly when i was checking the voltages i shorted the Vcc & ground together and the device started up, screen & volume was working and i was able to use the device, but when i turn it off it wont turn back on, would this suggest a short on the psu or on the board?

Any advice appreciated

https://ibb.co/4KH2N7k

https://ibb.co/VT6X6dQ

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@leeuk have you checked your on/off switch? What about corrosion on the board?

3 de jul de 2024 por oldturkey03

Theirs no corrosion anywhere on the board, the on off switch i cleaned in ipa and i get resistance cutting off / on when i flick the switch so i persume that would be ok?

3 de jul de 2024 por LeeUK

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@leeuk have you checked your on/off switch? What about corrosion on the board? — oldturkey03
Theirs no corrosion anywhere on the board, the on off switch i cleaned in ipa and i get resistance cutting off / on when i flick the switch so i persume that would be ok? — LeeUK

koppie007 @dan0 Rep: 25,9 mil 20 12 22 · Answer 1 · 2024-07-03T22:57:32-07:00

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koppie007 @dan0

Rep: 25,9 mil

20

12

22

Postado: 3 de jul de 2024

Opções

Most of the time it's caused by the board with the screen on it. Could also be the cable which is damaged/broken. When you have an healthy gameboy, and you detach the cable, you get the same result.

Must be an component which is broken on the board with the screen (most likely)..

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14 comentários:

Perfect ill have a look around that screen board later, it was the fact that if i short the VCC and gnd for a second everything comes on an works fine which through me off and made me think it wasnt a cable issue... strange 🤦‍♂️

3 de jul de 2024 por LeeUK

Alright! Yeah, it still could be the cable or the connector :(... Please check them both and run some tests to see what is failing... Good luck with the repair :)!

3 de jul de 2024 por koppie007

Iv tested the pins on the ribbon cable to the solder on the board, some of the pins on the board are showing continuity to more than 1 of the pads on the ribbom cable would this be a short on the ribbon?

4 de jul de 2024 por LeeUK

Yeah, could be.. Do you have a replacement board? Just to test if it works? Please check the capacitors there too, could be that one of them failed giving weird values.

5 de jul de 2024 por koppie007

I dont have another board no :( everything looks ok what i can see, iv just inspected the main board not the screen and came across this resistor that has yellow coming out of both sides... i can see it on some others but alot more on this 1, is this common?

6 de jul de 2024 por LeeUK

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Game Boy

Red light, no picture or sound

Update (07/06/24)

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