Vestel 17IPS20

[H477150n]

Hi guys
Hoping you can help im no pro at this tv molarchy but i am comfortable enough with electronics.
So Polaroid P40LED13 tv screen went blank but has sound...
Have checked power supply at led backlight and i am getting 189v on start up then dropping and stabilising at 121v.
from info gathered, This would appear to be normal with this panel. However no back lights, as these are in series would i be right to think that an LED has failed?

Thanks for any advice in advance guys

Harrison

[H477150n]

Re: Vestel 17IPS20

Also before i take off the the backlight for testing, would anybody happen to know the running Voltage of these individual LEDs?

[flocko]

Re: Vestel 17IPS20

Test LEDs in diode mode on meter will give a faint glow to good LEDs,or two AA cells in series =3v will do the same.Open LEDs will stop the set working, shorted LEDs will overload the others making them fail.

[dick_barton]

Re: Vestel 17IPS20

The leds are shown in the following link.

http://www.ebay.co.uk/itm/like/15217...0865095&crdt=0

Flocko sells leds which you can stack if you find any faulty ones

[ReeceyBurger123]

Re: Vestel 17IPS20

If you checked out the forum for 17ips20 you would know. You have a failed Led in the screen, as the voltage tried to start then drops down to unboosted 120v. Heres a link to my video showing hoe to replace them using Flockos ebay part:

https://m.youtube.com/watch?v=RxwdC7V5Ue0

[ReeceyBurger123]

Re: Vestel 17IPS20

Also after the Led repair I strongly advise you reload the core update software for this Tv as shown in my 17MB82 flashing power Led video, then factory reset the Tv and set the backlight down to Low in the menu doing this will help the Tv last a fair bit longer as the core update does not corrupt like the original firmware.

[H477150n]

Re: Vestel 17IPS20

Thanks guys i did suspect faulty LED but thought i would ask the Q first. Am going to get the backlight apart this evening and find the faulty led. Thank you all guys and thank you reeceyburger for the links i do appreciate it.

[ReeceyBurger123]

Re: Vestel 17IPS20

Ok keep us updated

[H477150n]

Re: Vestel 17IPS20

Update****


So striped down to backlight and 1 burnt out led on string A. As i have no spares i just ordered a complete string for £12, So easy fix then all sorted.

Oh no? NOT TO BE!
The mrs has broke the screen panel!

So in the bin it goes what a waste.

Nevermind, but thank you reeceyburger. Checked out your vids and cleared a few things up so were a big help :thumb:

[vinceroger69]

Re: Vestel 17IPS20

Update****


So striped down to backlight and 1 burnt out led on string A. As i have no spares i just ordered a complete string for £12, So easy fix then all sorted.

Oh no? NOT TO BE!
The mrs has broke the screen panel!

So in the bin it goes what a waste.

Nevermind, but thank you reeceyburger. Checked out your vids and cleared a few things up so were a big help :thumb:

Screens are so easy to break ive done one myself and nice too see another member from nuneaton on badcaps dont bin the pcb boards im sure they will come in handy for your future projects.

[H477150n]

Re: Vestel 17IPS20

Screens are so easy to break ive done one myself and nice too see another member from nuneaton on badcaps dont bin the pcb boards im sure they will come in handy for your future projects.

Small world eh
I am new to all this tv stuff really, do like a challenge haha
I will keep all the pcb and leds etc as like you say will come in handy in the future

[ReeceyBurger123]

Re: Vestel 17IPS20

How many tab bonds does this Tv have 2 ? If so I have a panel but I need a mb lol fancy selling me ?

[vinceroger69]

Re: Vestel 17IPS20

Small world eh
I am new to all this tv stuff really, do like a challenge haha
I will keep all the pcb and leds etc as like you say will come in handy in the future

Im fairly new to repairings tvs too but slowly building up more test equipment etc its just around this area theres not many faulty tvs for sale to repair etc and if there are any there stupid prices.