Need help finding LED backlight fuse [PICS]

[degutji]

Re: Need help finding LED backlight fuse [PICS]

I've been there before with dell inspiron no backlight, just blown fuse on the backpanel ( F1 ) jumper it with tiny wire and they work like charm backlight. as you say before just read on page 3 on forum notebookreview to located the fuse, hope you case same as my success story with dell led backlight

[Krisswe]

Re: Need help finding LED backlight fuse [PICS]

Can you send a link please. If you look at the pictures there is no F1 mark on the board.

[selldoor]

Re: Need help finding LED backlight fuse [PICS]

I cant see a fuse on this board - is there anything on the back.
Has anyone tried tracing back from the connector to try and find whwre the 12 v comes from.
I think Degutji is just saying what he did on his Dell so not really relevant

[trebo]

Re: Need help finding LED backlight fuse [PICS]

Can you send a link please. If you look at the pictures there is no F1 mark on the board.

The way I am reading it is, degutji is saying the fuse is on the LED panel, not the m/board.
But as you mentioned, a link would be great because I could not find it in notebookreview

[selldoor]

Re: Need help finding LED backlight fuse [PICS]

The way I am reading it is, degutji is saying the fuse is on the LED panel, not the m/board.
But as you mentioned, a link would be great because I could not find it in notebookreview

Yes I thought that as well but if there is no voltage at the connector it would seem to matter not if there is a fuse on the LED Panel? It needs to be established why there is no voltage at the connector - unless I have
totally mis -understood, although Budm seemed to suggest the same course of action twice - with little response.

[trebo]

Re: Need help finding LED backlight fuse [PICS]

Yes I thought that as well but if there is no voltage at the connector it would seem to matter not if there is a fuse on the LED Panel? It needs to be established why there is no voltage at the connector - unless I have
totally mis -understood, although Budm seemed to suggest the same course of action twice - with little response.

Yes of course, My mistake

[Krisswe]

Re: Need help finding LED backlight fuse [PICS]

I will get some help of a friend to find the fuse, or what ever is the problem. I'll get back if (when) we find anything.

[degutji]

Re: Need help finding LED backlight fuse [PICS]

For my case on Dell Inspiron same as this case http://forum.notebookreview.com/dell...cklight-3.html
For Asus K53 LED screen maybe like this http://www.laptopscreen.com/English/...US/K53-SX751V/
My Dell LED Screen look similar with ASUS K53 ( if laptopscreen.com made no mistake with the LED image on their site ) just put your red probe to the coil ( PL or L ) and black probe to GND , any voltage ? from that coil track in to Fuse ( F ). I can't see image more clearly so can't pin poin the fuse exactly, but i'm sure it's around coil and flex / ribbon LED backlight. Happy Practice

[NYJimbo]

Re: Need help finding LED backlight fuse [PICS]

Has this ever been resolved. Got a k53 in with same issue, person tried to replace lcd and now we see data but no light. Cant find the fuse if there is one and mosfet tests ok as well as ferrite bead.

[selldoor]

Re: Need help finding LED backlight fuse [PICS]

I dont think it was resolved - do you get a voltage on the connector that might drive the lights. Perhaps a good close up picture of the board on the panel would help.

[gijoey198079]

Re: Need help finding LED backlight fuse [PICS]

SOLVED, I have a asus k44h that i repaired a charging port on and had no backlight, well finally found the problem. In the pic below the (fuse???) circled in red had 17.98v going and 0v coming out, it has the letter/number O on it. I checked other identical chips and that had 0 resistance, so replaced it with one from an old board, power on and I have led backlight again.

Hope this helps, and ignore my poor soldering job, very hard on these small chips.

[refreshtech]

Re: Need help finding LED backlight fuse [PICS]

same 0 fuse can be found on the other side on Asus K53E it will fix the problem.

[dj_ricoh]

Re: Need help finding LED backlight fuse [PICS]

thats a jumper !
like crossing a side to another side.
voltage bridge

[gridl0ck]

Re: Need help finding LED backlight fuse [PICS]

Hello, I have the same problem. I changed the charging port and the screen now has no back light. Does anyone have a solution for this yet? Seems this is the only thread on the net with any decent info about this problem. Hope someone did find a fuse/resistor which is responsible for it.

Thank you.

[selldoor]

Re: Need help finding LED backlight fuse [PICS]

Same problem as who??? there are various problems with various machines in this thread. State clearly what your machine is make model variant and the problem together with clear pictures of your inverter board and we might be able to help.

[gridl0ck]

Re: Need help finding LED backlight fuse [PICS]

Sorry should have been more clear. I have the same issue as OP. The motherboard is from an Asus X53e model but the main board has listed on it K53SD rev 2.3. I dismantled the laptop to service he charging port. I did not need to replace the port as it had only become loose from its pad on the main board. I used a soldering iron to re-establish connection between the legs and board.

After that I proceeded to put the laptop back together when I thought I would double check everything. I connected the keyboard, screen cable and battery. I powered the laptop on and it was fine except the back light not showing.

I have looked at the board under a microscope and cannot see any visible damaged components.

I am away from my workshop now so will get some photos posted of the board tomorrow.

Thank you.

[it.vendor]

Re: Need help finding LED backlight fuse [PICS]

place a jumper over the FET S to D (LCD power) under pin No 1 of lcd jack on main board.

[gridl0ck]

Re: Need help finding LED backlight fuse [PICS]

Happy new year everyone. Been under the weather recently so didn't jave a chance to give an update. Pretty much still in the same situation. IT Vendor, are you able to point out on a photo of the part needing a jumper?

[selldoor]

Re: Need help finding LED backlight fuse [PICS]

Have you been able to get any Pictures yet?

I think he means an 8 legged component but need to see your board and also
need the part number off the component.

Someone else has also mentioned the 0 rated resistor if you have one of those you could test it same as a fuse.

[gridl0ck]

Re: Need help finding LED backlight fuse [PICS]

Hi, have attached some photos to this. There was a 0 component there which I tried to jump to see if it makes a difference, but no luck.