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Yamaha SPX-90 Display/Sound Issues
Old 1st May 2010
Here for the gear

Yamaha SPX-90 Display/Sound Issues

Hello Community,

This is my first post on gearslutz and look forward to my next.

This being said, I am having an issue with an old yamaha spx90.

I bought one for 20 bucksfrom a yardsale and when i got home I found that when I turned the unit on, the display just flickered, and the input volume meter was maxed out(even when nothing was plugged in). I tried opening the unit up to figure out the problem but still couldnt fix it - everything inside seemed fine (but I didn't try a new battery).

Then I tried plugging my bass in to the input and my headphones in the output - to see if I could get any sound. All I got was a small repeating click noise!!

After this I brought the unit back to refund my money.

BUT I STILL WANT TO BUY IT! (if i can fix it)

does anyone have any idea how to fix this and/or have had any similar problems?

20 bucks seems like a steal for the unit and would love to get it working.

Thanks in advance,


Old 2nd May 2010
Lives for gear
Radardoug's Avatar

Probably needs at least a power supply rebuild. Sounds like you are not technical. Time to find a tech and see what they say.
Old 27th September 2010
Gear Maniac
thomasdf's Avatar
Hi Snackerfish, did you solve your problem?

I have the exact same one, I opened a topic here:

Problem with my SPX90
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