Recommended replacement led for backlight--No Good!

[Alastair E]

Who was it on here recommended these!--

http://www.aliexpress.com/item/SAMSU...08.0.65.majZnl

Just to say a Warning to you all, They join the other three hundred Ive bought that were Also Utter Crap!

Firstly, The Cathode/Anode is reversed on the package. If you fit them (in reverse to the original) so they light--They Last exactly 2 minutes!
(Long enough for a quick test of function and after reassembly of panel, doesnt even give you time to tune in Digital before they black out.)

They fade slowly then go S/C. They arrived--fairly quickly, this morning, so I fitted some to a Samsung panel in a Vestel Toshiba 40". I tried Three Times--To be certain.

Ended stripping the panel for a second time to do the usual piggy-back with Genuine LED's from other sets, now working just fine...

I think this is THE last time I fork out over a tenner--for bloody LED's that last in minutes!

[martino]

Re: Recommended replacement led for backlight--No Good!

Agreed,I only use led's harvested from brand name sets. Doesn't take long to accumulate a nice stash of them.

[tech2014]

Re: Recommended replacement led for backlight--No Good!

Someone outside the badcaps site recommended them to me, so I bought them and recommended them on badcaps.

I guess they are crap too, so back to the drawing board lol. Sorry it didn't work out for you bud. The LG ones DO work as the tv I repaired and sold is still working.
Its strange that they have very good feedback from buyers yet they don't work for you.
Does anyone know where we can get genuine Samsung LEDs?

[Alastair E]

Re: Recommended replacement led for backlight--No Good!

Ah--It Was You!

Only kidding! We all get suckered sometimes Its just infuriating to have to do the job--Twice!

Had a Really Crap day today, and this little adventure was only the start of it!

[tech2014]

Re: Recommended replacement led for backlight--No Good!

Ah--It Was You!

Only kidding! We all get suckered sometimes Its just infuriating to have to do the job--Twice!

Had a Really Crap day today, and this little adventure was only the start of it!

Having to rip the set apart again would suck. Hope your day gets better.

[budm]

Re: Recommended replacement led for backlight--No Good!

I use those SAMSUNG (Large pad (substrate for heat transfer to the strip) for Cathode, the LG that I also order for LG repair has Large pad for Anode), installed about 60 of them on SAMSUNG three 32", on 39", one 40".
So far so good, no call back yet, I am using one every day right now in my bed room to verify it will last.

[Diah]

Re: Recommended replacement led for backlight--No Good!

the soldering way played big issue on the LED life time and the V out of its forward diode.. many read this and they thing its just bad quality and the zener diode built in are like they used to know.. but its not. how much high temperature or time of soldering will effected this value. smd led are designed to robot with infrarot heat.

[ReeceyBurger123]

Re: Recommended replacement led for backlight--No Good!

I just stack em, not worth spending the money on brand new ones.

[tech2014]

Re: Recommended replacement led for backlight--No Good!

I just stack em, not worth spending the money on brand new ones.

Stacking is great, but if you don't have any LED strips then replacing the LED itself is another option.

[ReeceyBurger123]

Re: Recommended replacement led for backlight--No Good!

I suppose lol I have plenty so Im good

[CapLeaker]

Re: Recommended replacement led for backlight--No Good!

budm gets them from aliexpress too...

http://www.aliexpress.com/item/SAMSU...612202958.html

[budm]

Re: Recommended replacement led for backlight--No Good!

Sure did, took 10 Days.

[CapLeaker]

Re: Recommended replacement led for backlight--No Good!

Sure did, took 10 Days.

did any of those fail yet?

[badcaphunter]

Re: Recommended replacement led for backlight--No Good!

I got some LG Innotek 7030 LEDs from AliExpress and had a few fail as soon as i powered up the TV, try and power the set up without assembling and let it run for half hour.

[budm]

Re: Recommended replacement led for backlight--No Good!

did any of those fail yet?

Not yet, it has been 2 weeks now for my bed room TV, the others are at customers and friends and they are still working.

[CapLeaker]

Re: Recommended replacement led for backlight--No Good!

Not yet, it has been 2 weeks now for my bed room TV, the others are at customers and friends and they are still working.

I figured, because I haven't read anything that any of these you had replaced failed. So I guess it is a hit or miss with those LED's at aliexpress.

[Alastair E]

Re: Recommended replacement led for backlight--No Good!

Right--Maybe just eating humble-pie...

Today, I had a 32 samsung LED that had three dead LED's. For a larf--and because it was dead quiet today I tried again.

I soldered the LED's in, but this time did that slightly differently. After removing the dead ones, I trimmed the gap between the conductors on the board slightly widening it and exposed a little more copper either side of the LED pads. I tinned up this fresh area and carefully soldered new LED's on. The new exposed areas making soldering Much quicker as the solder could easily creep under the new LED's so no excess heat was used, but also the extra solder either side adding to the heatsink effect for the new LED

I didnt bother fitting the lenses or panel back as was convinced I would be changing 'em again....

Bloody thing ran fine all afternoon.....

So--Maybe they Are OK after all, and I'm just a plumb!

[steves7839]

Re: Recommended replacement led for backlight--No Good!

https://www.badcaps.net/forum/showth...ense+32&page=2 LEDs rated 300mA or more made a lasting fix in my friends' 32" Hisense. (Thanks BudM for that advice!)
I ordered these:
MXA7-PW65-H001 Lumilite from Digikey. The color was more yellow than the rest of the LEDs, noticeable on the reassembled TV.