Crown LED 32185 no power no standby

[ragis]

Hi, folks i have a problem with this TV it has no power or standby led on
PSU - 17IPS11-R4
MB - 17MB82-2

I've done some measurements:
D107 - OK - 0.230R - 28V
D120 - OK - 0.560R - 28V
D136 - OK - 0.560R - 28V
D124 - OK - 0.560R - 28V
D126 - OK - 0.560R - 28V
The 4 D120-D126 are connected parallel
The main cap C101 - 68uF/400v shows 330V DC
Q105 - FDPF7N60NZ - OK
D130 - MBR10150FCT - OK
C113 - 100uF/100V - 28V (Someone before me had replaced it)

I've measured the voltage from CN100 and attached it but where the +5VSTBY must be there are 0.21V

I appreciate your help, best regards

[ReeceyBurger123]

Re: Crown LED 32185 no power no standby

Your Psu is ok, these literally only have a 12v and 24v output (24v goes straight to Led driver) they use Dc-Dc converters on the motherboards for the 5vstby and other rails on these.

[ReeceyBurger123]

Re: Crown LED 32185 no power no standby

Your motherboard likely has corrupt firmware which is not turning on the standby Led, have you checked to see if the Ir sensor has its 3.3v and 5v on it ? Thats one way to check if the motherboard is at fault. If it does your motherboard is bad.

[ragis]

Re: Crown LED 32185 no power no standby

Thanks for the reply, now i checked CN18 on the MB and it has 5V on the pins, then checked the LED and it has 3.3-3.5V.
So i think it gets his voltage, now what can i do or the MB is dead ?
Checked the LED and IR pcb - they both get 5V and the LED is ok it's not burned.But it can't just turn on or show standby maybe it's the MB what can i do to fix it or just have to replace it ?
Thank you again, best regards

[ragis]

Re: Crown LED 32185 no power no standby

Ok, the MB is dead officially...
I freezed the EEPROMs and no power/stnby...
Let it RIP
I think i'm gonna try with new MB.

[ReeceyBurger123]

Re: Crown LED 32185 no power no standby

Yeah go for it but be sure to match your motherboard to that exact panel if not it wont work

[ragis]

Re: Crown LED 32185 no power no standby

Ok, thanks can you tell me exactly what to look for the MB serial is:
17mb82-2 1912012
I've found some near around me i've upload it in the attachement

[ReeceyBurger123]

Re: Crown LED 32185 no power no standby

What panel does it use ? VES315WNDS = VESTEL 31.5" Led Module With Samsung Display. Will be something like that.

[ragis]

Re: Crown LED 32185 no power no standby

The panel is VES315WNDS - 01
Below the barcode there is another:
VEL_LCM VES315WNDS01_IPS11_32185_MB95

[ReeceyBurger123]

Re: Crown LED 32185 no power no standby

Yeah thats a Samsung Lsc320ap01 Lcd screen. Just look up the model of your Tv into ebay and see if any boards come up matching that screen.

[ragis]

Re: Crown LED 32185 no power no standby

No matching, my TV is not listed in ebay...
If i order the same part number of the mb from another tv will it work or no ?

[ReeceyBurger123]

Re: Crown LED 32185 no power no standby

You need the board to work with the exact same screen and Psu if not it wont work.

[ragis]

Re: Crown LED 32185 no power no standby

ok will this match:

MAIN AV BOARD 17MB82-2 19122012 23133239/23134654 NEO LED-32165DL PANEL VES315WNDA-01_TW IC TAS5721
MT5820LUNU
MT5135AE
TUNER
LC-32LD145K 32" LED TV 17MB82-2 19122012

[ReeceyBurger123]

Re: Crown LED 32185 no power no standby

No thats not a match, thats for a Ves315WUDA = Auo Lcd glass. Your Tv does not have that screen. You need a board that uses VES315-WNDS nothing else ! If not it wont work.

[ragis]

Re: Crown LED 32185 no power no standby

Ok, thanks mate for the help i've found similar board from:
Panel:VES315WNDS-01
MB: 17MB95M
PSU: 17IPS11 (300413-R4) which is like mine but has +cap C112 but i can add it to my PSU

One think i'm concerned about the backlight one friend told me to test it with the multimeter in diode mode on the 5th pin of the CN14 but the backlight didn't start... Do you have any idea or i have to tear down the panel i think if the backlight is off i can trow this damn TV in the junkyard

I've attached the similar mb and psu and the test for the backlight
Thanks again, i really appreciate your help sir