F61 IS THE ERROR CODE FOR A FAULT IN THE AMPLIFIER STAGE OF THE UNIT, THE MOST LIKELY CULPRIT IS THE AUDIO OUTPUT IC, WHICH IS A MULTI LEGGED DEVICE SCREWED TO A PIECE OF METAL USED TO COOL IT, IN PANASONICS ITS PREFIX WILL PROBABLY BE "RSN" BUT IT COULD BE "STK", MAKE A NOTE OF THE NUMBER AND SEARCH ON LINE, DONT FORGET TO CLEAN OFF THE OLD HEATSINK COMPOUND ON THE HEATSINK AND REPLACE WITH FRESH.