I've seen multiple post describing the problem with 2000 Lexus rx300 to a tee but no one has ever stated how they fixed it. The display screen lights up but nothing appears on it. I.e clock,mileage radio & heater settings. The heater doesn't work, door locks dont work, keyless entry doesn't work and dome light doesn't work unless manually switched on. Got a replacement screen radio unit from a salvage yard, put it in & problem still exist. Checked all fuses, put in new battery. I'm at a loss what to check next.