Been trying to fix this.Sony TC-WR99ES for some time now and have it narrowed down to Main Controller not starting. On main controller chip all voltages seem fine except the voltages going from this chip to reset the Mech drive chip and the reset the display controller. Problem is power on -no display or any controls work. Only deck lights on and capstan motors are running. I know problem is on main board only and nothing in the display or front panel as I tried it on good deck it worked fine. Any ideas from any of the Guru's here. This chip is impossible to find by the way.