Fujitsu PDS4222E-S

Hi, I'm an electronics engineer and was hoping to get some advice to repair this set plz...the set turns itself off randomly after a while like it gets too hot and needs to cool down for a bit...the error code as i would call it is that the standby led flashes constantly and if i try to turn it on with the remote control the green led lights up and swtiches back to red and continues to flash again...once i turn the set off from the main on/off switch and turn it back on after a short period then it will come back on again...would really appreciate the help as it seems this is a common fault on these chasis...the set is quite big and heavy and there are heaps of screws to get to the power supply and the 'x' n 'y' boards lol ...Thanking you in advance

Regards

Jay