Check the wall outlet connection; test the outlet with another device. Incorrect input source or loose wiring.
Whether you have just acquired a used unit or need to reconfigure your setup, this article covers the essential information found in the Sanyo DC-T990 user manual. Manual Home Theater Sanyo Dc T990 pdf
The "Protect" mode indicates that the onboard circuit breaker has tripped to safeguard internal components. Check the wall outlet connection; test the outlet
Specific error codes and solutions for CD reading issues or tape jams. Where to Find the Manual Home Theater Sanyo Dc T990 pdf Check the wall outlet connection
Most casual users never explore these gems, but the original PDF manual reveals: