Panasonic Oled 55EZ950E, no picture, red led blinking every 4 sec

[Davi.p]

Post #75:

I connected the sub on and the Power on but nothing happens

So you were wrong? So if you are sure now then make the guide test..

[riparo]

hi Davi.p I ran the test, the voltages are all present 5-16-24-e 12v with an external 1.5A power supply but I don't see anything on the screen, do I need to carry out some procedure from the keyboard? for the panel test?

[Davi.p]

maybe 12v 1,5A is a bit low.. need at least 2-2,5A, check the value of the fuse on the tcon

[riparo]

Ok

[Davi.p]

The guide i made is not 100% clear, i will rewrite it..

[riparo]

OK

[riparo]

maybe 12v 1,5A is a bit low.. need at least 2-2,5A, check the value of the fuse on the tcon

hi davi.p I tried with a 12v 3A power supply but the t-con doesn't turn on, isn't there a way to turn it on from the P board? I attach photo t-con with fuse value

[Davi.p]

try this guide.. at your own risk..
1) remove cables from A02 connector on A board.
2) place a jumper wire on pins 11 & 13 of P board P2 connector.
3) make a jumper from previous P2 connector pin 11 to PB board PB4 connector pin 1
4) insert input power cable on P board and check its outputs 5v, 16v and PB 24v
5) if are there, remove power cable, place by soldering a wire on input pad of fuse on tcon 12v input (near white wires), connect it to external 12v psu +, with alligator clip wire or whatever you want connect its gnd to tv chassis..
6) apply current to external psu and check it stays on and tcon doesn't heat too much, check the 12v on the tcon fuse..
7) remove 12v
9) put power cable on P board and check the presence of 24v on the fuse of tcon, put 12v and watch if the screen makes the test with good colors, if it makes garbage remove rapidly power from P board and then the external 12v
10) if the test works ok for several minutes then bad main board (A)

[riparo]

hello Davi.p very kind as always, thank you again for the support you are giving me in the forum, the guide was already perfect before but now you understand even better, I tried but unfortunately having all the voltages 5- 16-24 and 12v also on the T-con do not turn on the screen, I used a power supply for the T-con 12 v from 3A, thinking that the used one had a low amperage but does not turn on, I verified the voltages on the 2 fuses of T-con and are present 24 and 12v

[lotas]

T-Con will not just start from a simple power supply; it must still receive the “Enable” command from the motherboard.
How many times does the LED flash between pauses (4 seconds)?

[Davi.p]

To be clear i have removed the last instertion of the 24V, because i think in this model the 24v are switched by tcon at the right moment..

PS: i guess that the fault led code is the EVDD SOS..

[riparo]

tanti the.led flashes 1 time every 4 seconds, if I connect only the P card and the main card the power supply turns off and goes to protection and I no longer have current on the mainboard, while with the guide of Davi.p the voltages are all present, how do I enable the T-con to understand if the defect is precisely the mainboard?

[Davi.p]

T-Con will not just start from a simple power supply

Why? Usually there is an auto test mode.. no need to connect a main board..
the strange situation in this model is that panel 12v is generated on the main board and not the PSB, so the need of external PSU..
riparo, have you checked the external PSU has the GND line connected to the TV chassis? Is there a metal chassis on the TV?
dismount the tcon, carry it to to open air and get a photo minimum 2000x2000 at sun light..

[riparo]

sure the gnd is connected to the ground of the TV chassis, then as I said in the previous post the voltages on the t-con are present both the 24v that comes from the PB board and the 12v that comes from the external power supply, I attach photos t-con and await your suggestions to find a solution Davi.p e tanti

[Diah]

WARRING : to all visitor / Reader of this Threat .. please don't follow any test steps provided here... as they are all wrong experiment will toast the set as its now .. toasted the owner set by his hand and the guide.

[riparo]

WARRING : to all visitor / Reader of this Threat .. please don't follow any test steps provided here... as they are all wrong experiment will toast the set as its now .. toasted the owner set by his hand and the guide.

Hi, Diah sorry, could you explain better? Or if you know a procedure that allows us to carry out the test, it would be appreciated.

[Davi.p]

Test these testpoints in Volt when TCON is powered (only 12V input not 24v): VGH, VGL, cathode of D6003, VCC1.8, VCC3.3, 2.5V, 1.1V, DDR1.5V

[riparo]

Test these testpoints in Volt when TCON is powered (only 12V input not 24v): VGH, VGL, cathode of D6003, VCC1.8, VCC3.3, 2.5V, 1.1V, DDR1.5V

thanks a lot I'll let you know

[Davi.p]

I have circled points in RED...

[riparo]

ok