Originally this TV would power up for about a couple of seconds then shut down.
The wiring to the ysus goes via the zsus. I disconnected the ysus board result the same.I then disconnected the zsus board and the power supply runs with correct vsus and va voltages.I then found some short circuit diodes on the zsus.Fitted a new zsus and the screen flashed on for 2 seconds then off with power supply still running.I then checked voltages to the ysus with set running all correct but the heatsinks were cold as though not drawing any current.When I turned the set off and on again after a short while I heard a pop and the new zsus failed.Should I go for a replacement Ysus and Zsus and Is there anything else that can cause this.Thanks.
The wiring to the ysus goes via the zsus. I disconnected the ysus board result the same.I then disconnected the zsus board and the power supply runs with correct vsus and va voltages.I then found some short circuit diodes on the zsus.Fitted a new zsus and the screen flashed on for 2 seconds then off with power supply still running.I then checked voltages to the ysus with set running all correct but the heatsinks were cold as though not drawing any current.When I turned the set off and on again after a short while I heard a pop and the new zsus failed.Should I go for a replacement Ysus and Zsus and Is there anything else that can cause this.Thanks.
Comment