Wish I could make this glamorous but basically just replaced HDMI main board and it worked. This TV has three main boards. One with the analogue video inputs on it and the standby micro, plus one for HDMI, and one for Freeview DVB.
Found that the standby micro controls LEDs. I2C SDA/SCL communication between analogue and HDMI, but when unplugged, there wasn't any noticed change in the communication pattern, which seemed to indicate that the HDMI board wasn't responding. Also, no communication between main GENESIS processor and the HFRC (frame rate converter.) So, I took a punt that the HDMI board was bad (probably corrupted firmware.) The board was only £21.50 and the set is now working.
It did also have a minor tab bond problem (bottom quarter takes up to 30 seconds to appear), so I'm going to have to fix that too. It uses an LG Philips panel with master-slave inverter.
Picture not bad though could be better, 100Hz feature looks better than the cheap Vestel with 100Hz I recently fixed.
Found that the standby micro controls LEDs. I2C SDA/SCL communication between analogue and HDMI, but when unplugged, there wasn't any noticed change in the communication pattern, which seemed to indicate that the HDMI board wasn't responding. Also, no communication between main GENESIS processor and the HFRC (frame rate converter.) So, I took a punt that the HDMI board was bad (probably corrupted firmware.) The board was only £21.50 and the set is now working.
It did also have a minor tab bond problem (bottom quarter takes up to 30 seconds to appear), so I'm going to have to fix that too. It uses an LG Philips panel with master-slave inverter.
Picture not bad though could be better, 100Hz feature looks better than the cheap Vestel with 100Hz I recently fixed.
