Soniq S55V14B-AU Stuck in Standby

[Loagz]

Hi, I'm hoping someone can point me in the right direction....

I have a S55V14B TV and it suffered a board failure. Main board part number: 222-655036003-30. I couldn't find a board with the exact part number so I've used what looks to be the same board however the part number is slightly different. 222-655036002-30.

After installing the main board the stanby light came back on, however it wont turn on. I spoke to Soniq Australia and managed to get a copy of the firmware but no service manual. They don't have one. I asked about the different part numbers but they didn't seen to know what the differences were.
To install the firmware; Fat32 drive, files on root, hold CH+ and press power on TV itself, Should turn on and start installing. Still nothing. (Drive is 32GB USB3. Might try an older smaller one.)
I've measured the voltages coming from the power supply and everything looks okay.

Main board connector coming from power supply.

Label Voltage Actual

PWR_ON ? 4.08v
V_5VS 5v 5.23v
V_5V 5v 5.36v
V_5V 5v 5.36v
NC
NC
GND
GND
GND
AMP_VCC ? 11.92v
AMP_VCC ? 11.92v
With the connector unplugged all voltages disappear except the 5v coming from the powers supply. Power supply connector has 2 extra wires. BL_ON 0v and VADJ 140mv.

One strange thing is the heatsink on the main board gets warm even though the TV is turned off. Not cooking hot. Just warm. If the TV were on but just not the backlight would the standby light stay red?

I'm not sure where to look next. Any ideas?

[cheeky2]

Re: Soniq S55V14B-AU Stuck in Standby

Personally speaking I would never try a usb3 memory stick in a TV that I guess isn't designed to take a usb3 memory stick especially to try and flash the memory in the TV. Get a smaller usb2 stick anywhere between a 1gb to 4gb.
The speed matters and getting a super fast memory stick can prevent the data being transferred across to the main board, it will not recognise the information and will do nothing!
So that is where I would start. As I have experienced this previously on different TV models. I have a 128mb (yes Megabyte not GB) usb mp3 player that I use specifically to load the firmware onto a Samsung nand for a TV. It's the only one I have found that is slow enough for the TV to recognise it and load successfully!

[Loagz]

Re: Soniq S55V14B-AU Stuck in Standby

Awesome. Thank You. Will give it a go today and see.

[Loagz]

Re: Soniq S55V14B-AU Stuck in Standby

Sorry, no go on the USB stick attempt.