Sega Lindbergh high pitch squealing noise

[Brivs Mekis]

Hi, anybody have any high pitch squealing noises from their Lindberghs? It happens randomly during games, it's like a prolonged beep then it goes away.
It never used to happen with mine until I got it into my cab and it doesn't happen all the time.
The games all work fine.

Thanks.

 

[stj]

try a different power supply

 

[nnap]

there is a beeper on the grafics card. I am not sure what it does but I sometimes hear it on power on/off. One of my lindys has that beeper removed from the grafics card so it does not seem to be crucial.

 

[yombunker]

I hear that when i forget to plug the power to the graphics card. maybe your GPU is not getting the correct voltage sometimes and that's why it squeaks the GPU.

 

[Brivs Mekis]

Thanks for the replies, the power did cross my mind but I'm using the same PSU as I always have. The only difference is it is now plugged into an extension lead inside the cabinet rather than direct to the wall outlet.
It's a 350W PSU, I know people recommend 500W but the original Lindbergh PSU is rated as maximum 348W and the Lindbergh seems to run at around 180W.

 

[stj]

have you looked inside the psu?

the caps fail in 99% of pc psu's within 10years.

 

[Brivs Mekis]

The PSU is only 2 years old. I think I've figured it out, when I put the Lindbergh in my cab I needed to use 2x 24 pin ATX extenders which I never used before.
I've managed to move things around and remove 1 of them and have played a few hours without any noises..
Thanks for the replies.