lc60le751k blue power light only

[wreksta]

hi all just bought this tv
i was wondering if you can help me

the tv dont function light up or anything just a ble power light

ive tested all voltages from power board to mainboard

all seem correct all except the bl_on which reads 0.00v

if i unplug the led connector from the power board i get the 3.5v on bl_on

ive stripped tv panel and cant seem to find any broken burnt leds on the strips

please help on this one

[newtothis]

Re: lc60le751k blue power light only

Come'on you should know by now... Pics?

So with all boards connected when attempting to power the set do you get any voltage at all to BL_ON?

[wreksta]

Re: lc60le751k blue power light only

with everything connected i get no voltage on bl_on unless i disconnect the led connector from the the power board

and then i get the 3.5v on bl_on

ive tried to test the leds using multi meter cant get them to light up like i could with samsung leds

all have a resistance reading of about 7.55

[newtothis]

Re: lc60le751k blue power light only

Right so all power is present with LED's disconnected, All signals from main are good.

Can only be a dead LED.

[wreksta]

Re: lc60le751k blue power light only

signals from main board ???????

if you mean all signals from power board to the main yes all except bl_on


also on the led connector on the power board its states 117volts for each of the plus pins i can only read them at 86 volts

any ideas
also any ideas how to test this led strip please

[newtothis]

Re: lc60le751k blue power light only

No BL_ON comes from the mainboard to the PSU. Same as PS_ON.

Get us some pics

[wreksta]

Re: lc60le751k blue power light only

cant at present mate as im not with tv but there is nothing visible on the boards at all
\
ps_on voltage is present


can i just upload [pics stock from the net will this help

[budm]

Re: lc60le751k blue power light only

"also on the led connector on the power board its states 117volts for each of the plus pins i can only read them at 86 volts" You should monitor the pins to see if it did jump up to more than 100V and then drops down to 86V.

"if i unplug the led connector from the power board i get the 3.5v on bl_on" I s that the reading on the power supply board pin or on the main board pin? it looks it may have built-in pull up resistor on the power supply board for the BL-ON pin.
The power supply is made by FSP :FSP202-4FS01
http://www.fsp-group.com.tw/index.ph...roinfo&id=1717
https://flattvparts.co.uk/sharp-lc-6...z-fsp202-4fs01

[tom66]

Re: lc60le751k blue power light only

That does not look like a Sharp PSU, so I am guessing this TV is an OEM unit that Sharp have had made for themselves.
Yay - more re-badging crap for twice the price!
At least it's not a Vestel...!!

[wreksta]

Re: lc60le751k blue power light only

"also on the led connector on the power board its states 117volts for each of the plus pins i can only read them at 86 volts" You should monitor the pins to see if it did jump up to more than 100V and then drops down to 86V.

"if i unplug the led connector from the power board i get the 3.5v on bl_on" I s that the reading on the power supply board pin or on the main board pin? it looks it may have built-in pull up resistor on the power supply board for the BL-ON pin.

i tested from the mainboard mate

[budm]

Re: lc60le751k blue power light only

"all have a resistance reading of about 7.55" Is that the reading in OHMS, K Ohms, or M OHMS?

[sordids999]

Re: lc60le751k blue power light only

hi wreksta did you ever fix this tv or work out what was wrong ?
i have a chance of picking this one up with same fault,Red stand bye light is on when the plug is put in the mains . Then you press button and it goes blue as it should . And just stays blue

[zomi]

Re: lc60le751k blue power light only

I had one
Stayed blue no response, sometimes went into standby using power button
changed motherboard and then it worked..
also had no response from the motherboard.

[Peldah]

Re: lc60le751k blue power light only

Hi,
Did anyone find a solution on this one?
Have exactely the same problem as "wreksta".
As soon as I plug in the tv it turn on the Blue LED but nothing Moore.

Best regards, Pelle