in ThinkPad: X Series Laptops https://forums.lenovo.com/t5/ThinkPad-X-Series-Laptops/X61-Backlight-problem/m-p/73067 ThinkPad: X Series Laptops topics Thu, 27 Nov 2008 23:15:55 +0000 tp02_en <![CDATA[ ]]> https://forums.lenovo.com/topic/findpost/1301/73067/73067 My favour that has become a nightmare! Customers daughter has (had) an X61 about 6 months old. She managed to stand on the laptop (something on the top shelf I suppose). Anyway it was immediately evident that the LCD panel was broken and I offered to repla ]]> Thu, 27 Nov 2008 23:15:55 +0000 https://forums.lenovo.com/topic/findpost/1301/73067/73067 KevinNZ <![CDATA[ Re: X61 Backlight problem ]]> https://forums.lenovo.com/topic/findpost/1301/73067/73125 Welcome to the forum!

 

I'm going to say that you have an excellent train of thoughts, although I doubt that this statement is ]]> Fri, 28 Nov 2008 05:06:24 +0000 https://forums.lenovo.com/topic/findpost/1301/73067/73125 ajkula66 <![CDATA[ Re: X61 Backlight problem ]]> https://forums.lenovo.com/topic/findpost/1301/73067/73136 Hi George. Hearty thanks for the interest. The display side of the laptop is working as expected. External monitor works and it is also evident under appropriate light that the laptop display is working - its just the backlight that is faulty. (big word that "just").

 

I ]]> Fri, 28 Nov 2008 06:32:22 +0000 https://forums.lenovo.com/topic/findpost/1301/73067/73136 KevinNZ <![CDATA[ Re: X61 Backlight problem ]]> https://forums.lenovo.com/topic/findpost/1301/73067/73138 I've never seen a X61T open for surgery, so I really can't help you there, but...

 

You may want to take a couple of pictures o ]]> Fri, 28 Nov 2008 06:56:13 +0000 https://forums.lenovo.com/topic/findpost/1301/73067/73138 ajkula66 <![CDATA[ Re: X61 Backlight problem ]]> https://forums.lenovo.com/topic/findpost/1301/73067/74526 An update. Finally managed to get around to chasing up on a potential fuse problem. Opened the beast up and located a bad tooth within a few minutes. The track from the fuse leads to the LCD cable connector so I am mildly confident that the problem may be solved.

 

Next challenge i ]]> Wed, 03 Dec 2008 13:33:46 +0000 https://forums.lenovo.com/topic/findpost/1301/73067/74526 KevinNZ <![CDATA[ Re: X61 Backlight problem ]]> https://forums.lenovo.com/topic/findpost/1301/73067/74661 I think I managd to identify the fuse. Looks like it is going to be a 3amp from this series of fuses.

 

http://www.littlefuse.com/data/en/Data_Sheets/467.pdf

 

Now to find someone who st ]]> Wed, 03 Dec 2008 20:31:00 +0000 https://forums.lenovo.com/topic/findpost/1301/73067/74661 KevinNZ <![CDATA[ Re: X61 Backlight problem ]]> https://forums.lenovo.com/topic/findpost/1301/73067/75120 Fri, 05 Dec 2008 05:11:06 +0000 https://forums.lenovo.com/topic/findpost/1301/73067/75120 KevinNZ <![CDATA[ Re: X61 Backlight problem ]]> https://forums.lenovo.com/topic/findpost/1301/73067/243758 Can you provide me the details on how to diagnose this issue?

 

I recently just bought a new LCD for my laptop (X61S w/ ultralight).  last time I checked the broken  LCD light up (but was messed up).  This was months ago and the laptop has mostly just been sitting ever since, I did us ]]> Sun, 27 Jun 2010 07:22:26 +0000 https://forums.lenovo.com/topic/findpost/1301/73067/243758 Justintoxicated <![CDATA[ Re: X61 Backlight problem ]]> https://forums.lenovo.com/topic/findpost/1301/73067/243817 Hi Justin,

It was a while back, but will try and get the old head into memory recall mode. There are a bunch of things that can go wrong. Probably not the inverter - the lights that you see have nothing to do with the inverter circuitry - they relate status of hard drives, power etc, and ar ]]> Sun, 27 Jun 2010 18:28:24 +0000 https://forums.lenovo.com/topic/findpost/1301/73067/243817 KevinNZ <![CDATA[ Re: X61 Backlight problem ]]> https://forums.lenovo.com/topic/findpost/1301/73067/243824 Kevin, thanks for the reply.  There is indeed a signal going to the screen as I can see the windows and bios screens, but they are not illuminated by the backlight, so they are  pretty unusable.

 

I'm not sure what the fuses look like, I didn't see anything that looks like a typical f ]]> Sun, 27 Jun 2010 19:24:46 +0000 https://forums.lenovo.com/topic/findpost/1301/73067/243824 Justintoxicated <![CDATA[ Re: X61 Backlight problem ]]> https://forums.lenovo.com/topic/findpost/1301/73067/243834 justin,

 

as i mentioned in your thread on NBR this morning, it's either your LCD cable or inverter.   if you've used the system for this long without an LCD connected then you may have damaged the cable during that time.   given that you spilled beer on the screen, ]]> Sun, 27 Jun 2010 20:57:33 +0000 https://forums.lenovo.com/topic/findpost/1301/73067/243834 erik <![CDATA[ Re: X61 Backlight problem ]]> https://forums.lenovo.com/topic/findpost/1301/73067/243852 Hi Justin,

Ah Haaa! The Beer! At least the LCD panel died happy.

 

I personally would still make my first task to be doing a positive check on the inverter fuse. Worst case is that issues on the panel killed (or overloaded) the inverter which in turn killed the fuse. It is a sim ]]> Mon, 28 Jun 2010 01:00:15 +0000 https://forums.lenovo.com/topic/findpost/1301/73067/243852 KevinNZ <![CDATA[ Re: X61 Backlight problem ]]> https://forums.lenovo.com/topic/findpost/1301/73067/243890 Thanks Eric and Kevin, Looks like I have more laptop work to do.  I will try to pickup both an inverter and cable and go from there.  I love the the way this laptop is built and put together, its a pain to take apart (allot of small screws) but it is certainly easily rebuilt if you have the right ]]> Mon, 28 Jun 2010 06:01:13 +0000 https://forums.lenovo.com/topic/findpost/1301/73067/243890 Justintoxicated <![CDATA[ Re: X61 Backlight problem ]]> https://forums.lenovo.com/topic/findpost/1301/73067/244021 Kevin, Justin,

 

This discussion could become a great KB article for more advanced users wanting to troubleshoot and do more advanced repairs outside of warranty.  If you take some pictures and have more details on where you got the replacement components, ]]> Mon, 28 Jun 2010 19:55:15 +0000 https://forums.lenovo.com/topic/findpost/1301/73067/244021 Mark_Lenovo <![CDATA[ Re: X61 Backlight problem ]]> https://forums.lenovo.com/topic/findpost/1301/73067/244091 Mark, I will see what I can do, I do have an SLR with a macro lens but I don't have great lighting for photography at night.  I'm hoping to take it back apart tonight to check some of the components Kevin sent me pictures of.

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Mon, 28 Jun 2010 23:28:58 +0000 https://forums.lenovo.com/topic/findpost/1301/73067/244091 Justintoxicated
<![CDATA[ Re: X61 Backlight problem ]]> https://forums.lenovo.com/topic/findpost/1301/73067/244300 Tested Fuses F2, F3, F5 and they all checked out ok.


Now I guess the next step is to replace the ribbon cable.  But I can't figure out which part number I need.  My Lenovo was a custom order from lenovo.  It is, 1.8ghz Low VOltage CPU, 21.1" U ]]> Tue, 29 Jun 2010 18:20:49 +0000 https://forums.lenovo.com/topic/findpost/1301/73067/244300 Justintoxicated <![CDATA[ Re: X61 Backlight problem ]]> https://forums.lenovo.com/topic/findpost/1301/73067/244377 93P4536 is the correct FRU number for the X61s ultralight display.   the ultralight panel is made by toshiba (TMD).

 

either inverter will work with this panel.   39T5699 is manufactured by foxconn and 42T0152 is manufactured by YEC.   functionally ]]> Wed, 30 Jun 2010 00:03:45 +0000 https://forums.lenovo.com/topic/findpost/1301/73067/244377 erik <![CDATA[ Re: X61 Backlight problem ]]> https://forums.lenovo.com/topic/findpost/1301/73067/247421 So I got the inverter from Kevin and tried it out.  I have the same problem, the backlight does not come on.

 

Unfortunately I am not able to find a replacement ribbon cable.  The site liked above says for the part that I need to call to check availability, however I just waited on ho ]]> Mon, 12 Jul 2010 22:37:17 +0000 https://forums.lenovo.com/topic/findpost/1301/73067/247421 Justintoxicated <![CDATA[ Re: X61 Backlight problem ]]> https://forums.lenovo.com/topic/findpost/1301/73067/250979 I got the ribbon cable from lenovo today, it was about $54 shipped because they charge nearly as much to ship it as the cable costs itself.

 

The cable didn't work, I still get no backlight on my LCD.

 

I don't understand why or how this could happen.  Originally The LCD l ]]> Sat, 24 Jul 2010 03:54:47 +0000 https://forums.lenovo.com/topic/findpost/1301/73067/250979 Justintoxicated <![CDATA[ Re: X61 Backlight problem ]]> https://forums.lenovo.com/topic/findpost/1301/73067/607163 I was never able to  repair this laptop. 3 inverters, new cables, new LCD over $300 in parts and it never worked.

 

It  is  probably a fuse or something, if only I could by-pass that fuse  since they are non replacable fuses anyways.

 

Or find another  mainboard.

  Thu, 01 Dec 2011 07:08:34 +0000 https://forums.lenovo.com/topic/findpost/1301/73067/607163 Justintoxicated