JVC lt-32hg35e (Vestel) blinking LED

[vinceroger69]

they sound ok then (i was only asking as i had i strip in a set that was using more volts and amps i replaced that strip set worked fine) so oredered a whole new set maybe worth trying a replacement mainboard in yours set as new firmware not solving the issue.

[unimatrix93]

they sound ok then (i was only asking as i had i strip in a set that was using more volts and amps i replaced that strip set worked fine) so oredered a whole new set maybe worth trying a replacement mainboard in yours set as new firmware not solving the issue.

I also suspecting the mainboard now.

I noticed that the CPU is getting slightly warm, so it's an indication it's working.
I checked TP202 of short circuit protection while working and I measure 3V, is that okay?
Also, is it likely that the NAND died?

[Diah]

they are fine... put all together... and show please the print chart of the socket of PSU which it go to MB

[unimatrix93]

they are fine... put all together... and show please the print chart of the socket of PSU which it go to MB

Wish I could, but there is no print chart on the PSU. Or at least I cannot find it

[Diah]

not this.... any way from yours PDF it say PIN 7 BL_ON_OFF
so you put every things back and plug it in wall check if this pin have >3V.. if no. mean yours mainboards defect, or you missed with firmware so no signal of BL and TV didn't start.

[vinceroger69]

pic of connector voltages
diah beat me too it

[unimatrix93]

not this.... any way from yours PDF it say PIN 7 BL_ON_OFF
so you put every things back and plug it in wall check if this pin have >3V.. if no. mean yours mainboards defect, or you missed with firmware so no signal of BL and TV didn't start.

I see now!
I do this tomorrow and check it.
Will report back as soon as I can.
Thank you!

[unimatrix93]

not this.... any way from yours PDF it say PIN 7 BL_ON_OFF
so you put every things back and plug it in wall check if this pin have >3V.. if no. mean yours mainboards defect, or you missed with firmware so no signal of BL and TV didn't start.

So I put together the TV and measured PIN 7 on PSU connector.
It looks like 3V is missing.

I reflash the firmware, maybe I screwd up something.

Anything else I should check on the MB?

[Diah]

So I put together the TV and measured PIN 7 on PSU connector.
It looks like 3V is missing.

I reflash the firmware, maybe I screwd up something.

Anything else I should check on the MB?

you wrote at first post you have 12V... so the MB sending PS_ON... you need now to slide out the cable of pin 7 from the socket at PSU then take 3.3V from any Pin 17-19-21 via 1K R and fed the pin7
let see what will happen

[Diah]

one things more... from the pdf it show there are other circuit LED driver boards work with 24V if this the case... the socket need to disconnect of 24V and turn on.. let see if it start with no BL..

also upload photo on the whole back of the Tv to see how boards connected together

[unimatrix93]

one things more... from the pdf it show there are other circuit LED driver boards work with 24V if this the case... the socket need to disconnect of 24V and turn on.. let see if it start with no BL..

also upload photo on the whole back of the Tv to see how boards connected together

Here is the photo of the back of the TV.

I disconnected the LED driver board 24V connector and no effect, blinking led still.

[unimatrix93]

you wrote at first post you have 12V... so the MB sending PS_ON... you need now to slide out the cable of pin 7 from the socket at PSU then take 3.3V from any Pin 17-19-21 via 1K R and fed the pin7
let see what will happen

I shorted pin7 cable to 3.3v like this, still no change. 3.3V is present on cable

[Diah]

QUOTE=unimatrix93;n3267684]I shorted pin7 cable to 3.3v like this, still no change. 3.3V is present on cable[/QUOTE]

with this test 24 v socket should be plugged in place as original... see if the bl come on or if the 24V present at the socket

[unimatrix93]

QUOTE=unimatrix93;n3267684]I shorted pin7 cable to 3.3v like this, still no change. 3.3V is present on cable

with this test 24 v socket should be plugged in place as original... see if the bl come on or if the 24V present at the socket[/QUOTE]

24v driver board plugged in and same symptom.

[lotas]

Is your PFC working at all? What is the voltage on the capacitors, when switched on in operating mode it should be about +400v.

[unimatrix93]

Is your PFC working at all? What is the voltage on the capacitors, when switched on in operating mode it should be about +400v.

I checked them when I first tested the PSU, they are at 390V.

[Diah]

you still didn't answer... did you have the 24V after you did the jumpers

[unimatrix93]

you still didn't answer... did you have the 24V after you did the jumpers

i have 24V after the jumper mod yes but no BL coming on.

I rechecked the voltage on the pin7 cable and its only 0.30v, after the 1kohm resistor.

[Diah]

i have 24V after the jumper mod yes but no BL coming on.

I rechecked the voltage on the pin7 cable and its only 0.30v, after the 1kohm resistor.

you are doing wrong..
i wrote the cable of pin 7 should slide it out from the socket ( take it out ) the 1KR connected to the pin in the socket and other end to any pin of 17-19-21
it look from yours photo you climp the 1KR to the end of the cable which it belong to pin 7..

[unimatrix93]

you are doing wrong..
i wrote the cable of pin 7 should slide it out from the socket ( take it out ) the 1KR connected to the pin in the socket and other end to any pin of 17-19-21
it look from yours photo you climp the 1KR to the end of the cable which it belong to pin 7..

I'm sorry, I need to brew some stronger coffee.

I re-do it when I get to the TV.

Will report back soon, thank you!