Frogger help please

Meanstreak05

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Hi I am having problems with my Frogger I looked up other threads on here I have checked my voltages , changed the volume pot I keep having the same humming coming out of the speaker. I am having trouble finding info on my pcb also the number is 834-0084 on the main board the video is 834-0074 I have a Frogger manual but that pcb is not listed in my books it skips my number and goes to 834-0085 . the heat black sink that's by the edge connector gets really hot to the touch I didn't know if this was normal I didn't know if this helped but the numbers on my stickers were p/n:700-0069-00 please help me out thank you
 
Humming out of the speaker is most likely caused by a power supply issue. The hum is probably a 60hz hum caused by a filtration issue.

Shotgun the power supply and replace the filter caps.

PS I like that game. next time one passes by me I will snatch it up.
 
It does not have any caps on it its just a isolation transformer with the numbers 560-0054 and three fuses beside it and then the power for the edge connector and then all the other plugs branch off it like control panel connector ,then connector for the monitor and speaker and service switch
 
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