I purchase this about 6 years ago and had it stored in the loft and im pretty sure it worked fine before putting it away
I came across this thread here
www.boomboxery.com
Mine is pretty much the same except there is volume to a small degree, im no expert in any type of electronics , would cleaning the slider be a good place to start if so what do i need to buy to do it, its on all the functions as both tapes do it and so does the radio.
Thanks
I came across this thread here

HELP WANTED ! Sharp GF-555. NO voice / sound on left speaker ??? Right one works
Hi there! I have an issue on my Sharp GF-555 boombox. The right speaker works as a charm (and also bass & treble works), but does not give any sound from the left speaker ? Right / Left slider don´t make difference, only sound goes mute if i turn slider totally left (only very very low volume...

Mine is pretty much the same except there is volume to a small degree, im no expert in any type of electronics , would cleaning the slider be a good place to start if so what do i need to buy to do it, its on all the functions as both tapes do it and so does the radio.
Thanks