No Backlight on LED screen

OK, thanks.
Which ones are fuses? So i start testing them.
Thanks,

 

I have attached the picture. Fuse is circled in red.

 

I can't see any fuse in the picture except the one I circled in red.
It designated as FBB5. F usually stands for fuse

 

Hi , i just remove the board and take pictures for both sides.


http://imageshack.com/a/img855/2055/7a66.jpg
http://imageshack.com/a/img820/1091/e77g.jpg
http://imageshack.com/a/img855/5557/23er.jpg
http://imageshack.com/a/img820/3586/v39y.jpg
http://imageshack.com/a/img855/6468/67dd.jpg
http://imageshack.com/a/img842/5175/9twz.jpg
http://imageshack.com/a/img822/3198/6dmg.jpg
http://imageshack.com/a/img820/9535/ca48.jpg
http://imageshack.com/a/img834/2001/fgz7y.jpg
Thank you

 

I am having a backlight issue as well, here is a link to the board from a vaio pcg-71315L. https://www.dropbox.com/sh/dsv6w4z0ktiv7ai/AAB9WDv-ju9D4AnF4hn0M0I5a. Comment says works using F16 fuse, but I tested it, and it seems to be fine (0 resistance). Any suggestions?

 

Just to let you know that I successefully fixed a Sony VAIO PCG-71811M with the backlight problem by soldering a wire in the F4 fuse.
thank you.

 

b u m p s

 

Hello,
Just to confirm that the fuse for the backlight of the HP 15 D008SV is the FBB5 as mentioned by ngvuanh. After I had it jumpered, everything worked properly.
Thanks for your contribution.

 

For your laptop, F16 is LED fuse. If it is not blown, then you have a different issue with back light supply.

Sent from my C6916 using Tapatalk

 

hi. i have compaq cq43. is it possible that my problem is with the fuse for the backlight? the problem is when i opened my laptop it is ok. but afer a 10-20 secs the backlight sudenly goes off. when i close the lid and open it up again the backlight goes on again then off after 10-20secs. is this a fuse problem? please help me.

and sorry for my bad english

 

Hi
i have the same problem with toshiba d850 100
I try to test a 14” led display in a friends laptop and it looks like i blow the fuse
I would be very happy if u can point where is located the fuse
I remove the board and take pictures for both sides.


http://imageshack.com/a/img855/2055/7a66.jpg
http://imageshack.com/a/img820/1091/e77g.jpg
http://imageshack.com/a/img855/5557/23er.jpg
http://imageshack.com/a/img820/3586/v39y.jpg
http://imageshack.com/a/img855/6468/67dd.jpg
http://imageshack.com/a/img842/5175/9twz.jpg
http://imageshack.com/a/img822/3198/6dmg.jpg
http://imageshack.com/a/img820/9535/ca48.jpg
http://imageshack.com/a/img834/2001/fgz7y.jpg
Thank you

 

Hi,
I have the same issue with my Sony Vaio SVS1512s1es: broken screen, got a new one and a new LVDS cable = no backlight. I need some help to figure out what fuse is blown.
Removed mobo, pictures from both sides:
https://imageshack.com/i/nmzl7j3j
https://imageshack.com/i/n6pdvcj

Thank you

 

hi , i found the fuse (label N) on the sony vaio SVE15111EBS, was cracked causing no blacklight, i make jump with wire, tested, works fine !!!! thanks !!!!

 

Hey guys ive also had a problem with my backlight. Can anyone locate the fuse for me please? I really have no idea what I am doing so this is a good learning exercise for me. Any help is much appreciated!

 

If you did the search in this thread, you could have fixed your laptop by now.
Your laptop fuse has been located in many posts in this thread. It is F16 on the other side of the board.

 

Sorry I wasn't sure how to search the thread and my internet connection keeps dropping. Do you know what page it was on please? Sorry, Ive never used a forum before

 

Also I cant find the f16? I found the f17 and the f12 but there doesn't seem to be a f16? Could someone please circle it in the photo please? Sorry for being a dumbàśš , Ive never used a forum before or taken apart a laptop. Hence my username lol (ಥ﹏ಥ

 

Okay so i found the f16 but there doesn't seem to be a fuse there? Has it fallen off? Or is it one of the smaller ones around, and if so which one? I am really sorry for bugging you guys, but I really need to work this out as I dont have any $ to pay for it to be fixed:-( i know you said f16 but are you sure it is not the f15 here?

 

You can try F15 since it marks with N.

 

can u please have a look @ my motherboard

 

Can you try to take pictures with higher resolution? Do not zoom in.
So far, I can't see what I'm looking for.

 

Having the same issue with a Toshiba Portege Z935-ST2N01. Can you please help me. As is evident from the pic, I tried to bridge the one labeled N near the video connector, but it did nothing. I tried the one next to the N as well. Rather than sitting here risking damaging the board further I thought I'd ask. It does output video to an external monitor. Screen works fine when tested in another laptop, so I can rule that out as well. It has to be on the board, I just can't find it. Help? Thanks for your time

 

Try the one in red circle.

 

https://hlucaflorin.sharefile.com/d/s1643b7efb0448c28
I hope its better
thanks Luca

 

Ok, I replaced the screen on VPCCB490X with battery off. I connected the new screen and tested it before assembling everything together and it worked perfect. I disconnected the battery again and assembled everything but once I assembled everything, the new screen does not work. It acts as if no power is going to it. I connected the old screen (with battery off) and it works. I can see it boot up. This means this is not a fuse issue right? The new screen flashes on and then off right before windows gets to the login screen. I contacted the company I bought it from and they led me to this forum about this fuse issue...thanks in advance for the help.

 

Hi Guys Could you help me find out where the fuse is located in my laptop model is: SVE1512B1EW. Thanks

 

Hey guys, so. I bought a multimeter to check my fuse but i really dont know what setting to use and what sort of number I should be looking for? this is the multimeter. But can anyone tell me where exactly the dial should be? My laptop is a sony E series and ngvuanh (thanks for your help bro!) told me the fuse is probably the f15 that needs testing? Can someone please tell me what I should be doing please? Thanks for your help I really really appreciate the help

 

I read online that it should be on the continuity setting which is the plus symbol so Ive put it on (at the 5oclock if it were a clock) and then tested it and it stays at 1? Is that the right setting? And should it be registering something if it was still fine? Im so sorry for being such a dümbaśs! I honestly appreciate the help from you guys, it means a lot. So to clarify it shows 1when on that setting and then once on the fuse it still shows 1?

 

Can anyone please tell me how to test this fuse? I'm an absolute retárd and cant work it out.

Edit: so ive been doing it wrong all along I think. That setting was for diodes(?). I put it on 20m ohms and the base reading is a 1. But once I test the fuse it says 0.01 does that mean the fuse is fine? Once again sorry to spam here, and thank you for your time.

 

Anyone? Please? I'm not sure if that means its ok or not?

 

If fuse reads 0, then it's ok.

 

So if it reads 0.01 would that mean its blown? Cause I bought a new screen and the backlight isnt working with that either. What should I do now? Should I just bridge it and hope for the best? And thank you for the reply Ngvuanh I appreciate the help.

 

Please Please, I made a mess
I bridged F16 fuse and everything was ok with old LED but I was silly and checked again new LED if it's working but didn't work.Now old Led is night lighting up. I can read 19.5V on F16 Fuse but I beleive something else is Blown which i can not have power for LED Backlight.
ngvuanh, I know you are genius . Please advice me

 

By the way , My laptop is Sony Vaio VPCCB

 

Hi
would you help me please.

 

if its not the fuse what can i do?

 

Hi

Hopefully you can help me identify the fuse on a sony MBX-203 motherboard - it's out of a Sony CPCX11Z1E model PCG-21111M

I have the same symptoms - laptop works fine on external monitor but no backlight

sorry I can't get a picture to upload

 

Hi, my Vaio VPCCA290X seems to have the same problem. Only the backlight does not work. Linked are the pictures of both sides of my motherboard near the connector. Can someone please point out which fuse I can short circuit to fix it? Thank you very much.

imgur: the simple image sharer
imgur: the simple image sharer

 

Fuse is in the red circle.

 

Fuse is in the red circle marked as F15.

 

I know this post may be old, but by both sides, do you mean both sides of the motherboard?

I've run into a backlight problem on a cq57 as well. Tried a different led screen I had laying around and still no backlight. I did find the fbb4 fuse along with the fbb1, 2, and 3 fuses on the top side of the motherboard, tried jumping them, but still nothing.

Any other areas to check

Sent from my HTC6525LVW using Tapatalk

 

Thank you very much, for not only replying but finding an image

I wasn't brave enough to try, but I spotted what I think is a 14 on top of the item you circled

Thanks again

 

Anyone...
Iv uploaded some pics of the area, and circled one fbb4 that i checked, also just checked the continunity on fbb4 and my meter buzzed, and fbb4 looks like it might be good. Is there any other fuses I should go after.

 

FBB4 is LED fuse as I read in schematic. You should check voltage on both end of the fuse.
Make sure it is about +19V

 

19.3 on both sides of the fuse.

Sent from my HTC6525LVW using Tapatalk

 

That means it's not the fuse issue.

Sent from my C6916 using Tapatalk

 

I know it's on the motherboard somewhere, because I plugged in another screen I had laying around, and still same results.

Any other places I can check?

 

Glad I found this forum guy's, in 11 years of repairing laptops on a regular basis I've never had to remove a battery from a laptop when it's switched off to replace the screen and found myself with the same problem on a VPCEB4 laptop.

The fuse was so small I missed it when testing every fuse I could see on there before coming across this forum and seeing it was the very tiny fuse with the letter H or N on it, can't remember now but after replacing it, it works fine. Many kind thanks to you guys, my customer's GF will be a very happy girl as she was very stressed out by it all.

Regards guys,Teck

 

Hey guys

Im having trouble finding the fuse for my sony sve14aa11w
i have a couple of photos of the area around the screen connector
THanks in advance for anyone that can help me

 

Search is your friend. See post #232.