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The Sega Game Gear portable gaming device was released in 1991 in competition with the Nintendo Game Boy.

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Intermittent power LED and low speaker whine

I have this game gear which I just replaced main board and audio capacitors for and everything seemed okay following an hour or so of play testing, however one of the buttons wasn’t always responsive - so I opened everything back up, cleaned the button contacts with some IPA and closed it up again.

When I power it up now though, the power LED blinks on and off and the speakers are emitting a faint whine, changing its pitch in time with the LED’s flickering. I haven’t checked anything inside yet, but what could be causing this issue?

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I believe the problems I was experiencing were all related to the power board of the unit, with improper voltages going to the sound board (causing the whine) and motherboard (low voltage causes the LED to blink). A new power board solved my issue, though a recap pf the board may have worked too.

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Emily H zal eeuwig dankbaar zijn.
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