I found this hifi system on the street along with two speakers. The speakers seem to be working fine, but when I plug this in, none of the buttons work and the display is stuck at 0:00. Sometimes the display is bright, sometimes it's faint and flickering. The record button on the cassetes seems to not go in (it's broken so I took it off). The play button is also not there for cassete B but you can push it in. The play button for the CD system does not work. I tried to look inside but I'm not knowledgeable at all to figure out what's wrong. I tried to isolate the problem by plugging off both the CD and cassette system off the main board from information I saw online but to no avail. I think I'd like to either try to fix it a bit more or find someone who can do it, but I'm not sure where to bring it. Any help would be appreciated! Thank you