Sharp TV LC-40LE600E

[nomoresonys]

That's not much of a response, the question WAS, CAN you prove the eeprom is the issue?? Good troubleshooters like Diah, don't guess or jump to conclusions, CAN NOT say the same for you tho.

[nomoresonys]

Sure I can try to help the op if they want OR they can run out and get a programmer and reprogram the eeprom AND HOPE that was the issue.

[nomoresonys]

Go ahead and try post #9 three more times, wait a minute or two between tries.

[nomoresonys]

So lets troubleshoot, looks like lotus just wants to criticize and not really be helpful, that's my opinion.

[nomoresonys]

I'm done, looks like Diah was right, lets see if lotus is able/willing to help this op.

[nomoresonys]

HEY mod, I consider post #18 to be rude, just because this guy is more subtle/sneaky with his RUDENESS doesn't mean it isn't there.

[nomoresonys]

He may be better off/more suited to one of those debate/fight chat rooms, lol.

[nomoresonys]

Well at least now you know, ask Diah and some others what they think or just read some threads, the truth will win out.

[Diah]

Hi everyone?!
The LED stay red and fixed (no flashing)

What could I test please?

Thanks

in you case when there are no action at front indicator,,, we will first disconnect the MB from PSU.. and test the PSU as stand alone to be sure the SMPS working and it will provide all needed Voltage... when the result good.. then we will move to MB to check why it didn't send Power_ON to PSU to turn on the SMPS... so the steps should be ..

[nomoresonys]

in you case when there are no action at front indicator,,, we will first disconnect the MB from PSU.. and test the PSU as stand alone to be sure the SMPS working and it will provide all needed Voltage... when the result good.. then we will move to MB to check why it didn't send Power_ON to PSU to turn on the SMPS... so the steps should be ..

+100, Now that's logical.

[Kerden]

Here are some measurements from the PSU disconnected from the MB
MotherBoard disconnected from PSU




Fused F7002 ok

Fused F7001 ok

C 7144 ….. 395v and keep on going down

VA 7002 …..

D7105….. 101v

D7106….. 101v

C7124….. 0,125v

D7113….. 0,073v

D7114….. 2,7v

JP7130…. 0,3v

D7112….. 0,16v

R7141….. 0,0v 7ohms

R7143….. 0,0v 7ohms

D7115….. 0,0v

D7203 …. 0,002v

L7111….. 0,0v

D7204…..0,0v

R7159 ….0,0v 7ohms

R7192 ….0,0v 7ohms

D7150 ….5,0v

D7123 …..0,0v

D7149 …..4,2v

D7134 …..0,06v

D7126 …..0,06v

D7122….. 0,0v

D7128 …..4,2v

D7127 …..4,4v

C7518 …..0,0v

C7505…...0,0v

C7506….. 0,0v

C7531 …..0,0v

R7599 …..OL

R7589 …..OL

[nomoresonys]

You want to test correctly, for testing the diodes, UNPLUG tv from power, meter in diode mode, for resistors same, tv unplugged, test in ohm mode, that's your first test to see if they are functional. You need to be careful while testing when tv is powered, you have to use the correct grounds, be VERY careful what you touch with your hands you don't want that 395 volts zapping you, it can be deadly, youtube is full of videos on testing.

[nomoresonys]

So when you tested like that, did you see where the voltage settled at on C 7144? Something seems strange about it.

[Kerden]

So when you tested like that, did you see where the voltage settled at on C 7144? Something seems strange about it.

I already have tested the C 7144 at 395 v

I've pluged the MB and I mesured 350v before it begins to do down.

[nomoresonys]

Need to be clear on statements, so you're saying that with MB unhooked you get 395 steady volts?

[Kerden]

The C7144 gives 395v when plugged to the moterboard
When unplugged, tio the motherboard it gives 280v and keep on going down

[nomoresonys]

Well 395 when hooked up as it should be is normal, when unhooked from mainboard there's no signal from mainboard telling the powerboard to turn on fully so that's to be expected, usually on boards with pfc, you will get about 165 volts at the big filter caps when testing with that cable unhooked.

[Kerden]

Thank you very much for the explanations, I will look after the C7144


With the motherboard plugged in:
The C7510 gives 5.11v
The C7505 gives 0.0v
Only, if I press the On button on the TV, the speakers start to crackle
And the voltage goes to 3.2v


I wanted to repeat the same operation and it didn't work:
The C7510 still stays at 5.11v
But the C7505 stays at 0.0v

So sometimes this C7505 is powered, sometimes it is not.

[Diah]

hey people what are you talking and testing C ... LOL C will be stay in charge 100 years if it get V and no way to discharged if there open circuit that it couldn't discharge.... so any C on PSU most discharge first within the main caps on PSU

[lotas]

usually on boards with pfc, you will get about 165 volts at the big filter caps when testing with that cable unhooked.

You get 165v when the network is 120v, and when the network is 220v (France), then 165v will not be there, but 310v-320v