JVC EM32TS LCD tv wont power on

[shelby5041]

hi

i have this tv and it wont power on..no image..no backlight

here are voltages when tv plugged in

1: 5v
2: 0
3: 0
4: 0
5: 3.3v
6: 5v
7: 0
8: 1.5v

if i power tv on i get a momentary voltage less than 1 second at the led output of about 65v but then slowly goes down to zero

can see the white led on front of tv turn on then off...

none of the backlight leds light up even for a fraction of a second.

if i unplug the led power connector is does same thing

any ideas?

these cheap made crap tvs seem to always be led issues or eeprom..but since none of the leds light up even for a fraction of second im not sure issue here..i would have bet it was led issue casuing to to power off immediatley but since none are lighting up im not sure..

[petehall347]

Re: JVC EM32TS LCD tv wont power on

you could try freezing the eeprom

[shelby5041]

Re: JVC EM32TS LCD tv wont power on

thanks
well today i powered it on and off over 50 times and the leds never lit up at all

there are 3 led strips

i removed 1 strip from the equation and i then powered tv on and the leds lit up for a fraction of a second

but now wont light up again when powered on...maybe fried led ..im sure removing 1 strip and keeping the voltage the same is not a good idea but its just possible that this is a led issue since the leds only lit up when i removed 1 strip

what you think pete?

[petehall347]

Re: JVC EM32TS LCD tv wont power on

take it you dont have an led tester ?
if you did then you could check if there really is any image at all by lighting up a set first . just been through it on myself with badged tv but from umc . think yours might be amtran .
i swore there wasn't an image but i happened to look at it in lower light and could just see the image .

[shelby5041]

Re: JVC EM32TS LCD tv wont power on

no but i have a 12v power supply i can use to rtest each strip..i have done that before

ill try that and get back

i really think its a led issue and i now prob fied the other 2 strips when i removed the 1 strip and then powered on tv..prob roo many volts

my voltage going to led is about 85v so 85v going to 2 strips prob fried those 2

[petehall347]

Re: JVC EM32TS LCD tv wont power on

i believe with led.s its the current rather than voltage that matters .

[shelby5041]

Re: JVC EM32TS LCD tv wont power on

well i tested the led strips with a 12 ac adapter

the strip i removed originally ineed was bad..has 2 bad leds

there is 1 strip that is good

however the 1st strip in series appears to be 100% bad all leds..i tried testing it 25 times...they will not power on like the other strips..i find it odd that all the leds would be fried but its possible since its the first strip in series and when i removed the 1 strip and powered tv on maybe it had too much current and blew all the leds on the strip..seems strange but i guess its possible..