CAR DVD PLAYER WON'T POWER UP. JUST HAP...

LUXMA LUXMA CAR DVD PLAYER ITEM ITEM #LDVD-108TV DOES NOT EVEN POWER UP ALL OF THE SUDDEN. IT MAY HAVE BEEN KICKED OR BUMPED AS IT SITS UNDER THE BACK SEAT. I TRIED TO FIND SCHEMATICS FOR THIS SYSTEM ON THE NET, BUT COULDN'T (MAYBE NOT LOOKING IN THE RIGHT PLACE) SO SOME PLAIN OLD=FASHIONED TROUBLESHOOTING ADVICE WOULD BE APPRECIATED SO THAT I KNOW WHICH DIRECTION TO TOSS IT! IT'S BEEN WATCHED LESS THAN 10 TIMES!!! ALSO, IF BOARD REPAIR SEEMS NECESSARY, IT MAY BE A WASTE OF MONEY TO REPAIR AS THEY ARE BECOMING HARDER TO FIND NOW WITH NEWER MODELS APPEARING EVERY DAY. THE MONITOR WITH THE SYSTEM IS A 10.4" FLIP DOWN LCD #LFM-104X1 TFT LCD AND ALSO USING A Coleman 400 Watt Power Inverter. BOTH THE PLAYER AND MONITOR HAVE REMOTES.