Soniq QSL422XTV2 - not standy light and will not turn on

[JohnML1975]

Hello All

Have this TV and just started working on it
Removed back panel and cannot see obvious problem
Used thermal camera and the boards appear to not have power going to them

Discon M/B to PSU and fault did not change
Did same with T-CON board and fault did not change

Next I will check if there is power going to the T-CON and the LCD inverter boards and the Main Board M/B

Thank you

[JohnML1975]

Uploaded some photos

I have no power to the fuses on the T con and no power to the fuses on the inverter board

from the PSU to the mainboard I only have 5.1 V as STBY voltage where it says STB
No other voltages on that connecter are present

I did lazy check on the mother board at some of the inductors and found no power

i am going to remove the PSU and have a clean of it and have a look as well

Thank you

[JohnML1975]

Update
The TV works, it turns on and the back light works
There is power button under the TV which needs to be on
Then use remote or standy button on side of TV to turn it on

However, when I test the the TV using HDMI the picture seems to connect then drop out
It says either no signal or not supported

So I still need to solve the HDMI problem

[JohnML1975]

Looked at HDMI ports and chip and surrounding capacitors
Cannot really see anything
Ran sharp spike along HDMI port legs and they all seem secure
Checked for shorts on all the SMD capacitors and cannot see anything

Might try connect HDMI and then use thermal camera to see if anything shows uo

[R_J]

Your HDMI source could be sending an unsupported resolution to the tv, change the output on the source device to something the tv supports.

[lotas]

Yes, that's a good point, switch the source to HD Ready resolution (1366 x 768).

[sigmeyer]

And what about other HDMI ports , do they also drop out? If its not a port issue , than do what they say above , and also try different cable...