I recently found a Thinkpad i Series 1124 (in general, a Thinkpad 240Z which is not black, but silver and was only sold in Japan - type 2609-73J) on eBay and had the luck to get it for a really good price. The overall condition of the machine is quite good, the keyboard is really nice (better than that in my Thinkpad 240) and the XGA screen resolution is much more fun than the SVGA screen on the 240.
But it has one big issue - a display cable problem which means that the screen won't show the graphics output, but is completely white. On my Thinkpad, it is still working in a varying rage of display opening angles - at the moment, it is working between about 70° and 80° display opening angle, if I open it further, the screen turns white.
I don't know exactly what the problem is - in general, there are three componens which could cause it:
- Display connector on the mainboard
- Display cable itself
- Display panel connector
I have another 240 (300 Mhz Celeron, broken SVGA screen, LCD type B) here which could probably help me finding out what causes the problem and probably even repairing it. As I already said, the 240's screen is broken, but some areas on the screen are still working, and so does the display cable. I thought of checking the points mentioned above like that:Display connector on the mainboard
In general, I could attach the 240's SVGA screen to the i Series 1124 to see if the problem also occurs with that screen - if it does, I would have to check the connector on the mainboard. The 240's SVGA screen cable would fit to the connector on the i Series 1124's mainboard and I know that there was a i Series 1124 (2609-53J with 450 MHz Celeron and 2 MB graphics chip) that had a SVGA screen, but my model was only sold with XGA, of course. Do you think that this would work? Or could this possibly break the SVGA display cable or the i Series 1124's mainboard?Display cable itself
I already disassebmled the i Series 1124 (for replacing the broken trackpoint buttons) and found that the copper tape on the display cable is still in place and has never been taken off. I tried to put some more tape on it to hold the cable in place, but this didn't work, the problem still exists.
I think that I won't be able to try to repair the display cable itself. I already compared the HMMs of the Thinkpad 240 and the i Series 1124 and found out that the drawings of the 240's LCD type B cable and the i Series 1124's XGA display cable look the same. The FRU numbers are not identical (XGA cable is 27L0606, but could be wrong because Google shows "IBM phone line cable" for it, SVGA LCD type B cable is 27L0489), but I found out that both screens are Hitachi screens. The SVGA LCD type B is either the TX26D31VC1CAA
or the TX26D32VC1CAA
with that cable
, the XGA screen is the TX26D20VC1CAA. Looking at the screen's product numbers, they could belong to the same series and therefore have the same connectors, but I don't know that for sure. I looked for data sheets for the panels, but I wasn't able to find them.
Does somebody here maybe know where to find the data sheets for the panels?
As I already said, the LCD cable drawings in the HMMs look the same, and if they really look identical, I'd assume that the SVGA LCD type B cable would mechanically fit into the XGA screen, so I have two other questions:
- Is it possible that the same cable is used for a SVGA screen and for a XGA screen? Or is this technically impossible?
- If I would just try out using the SVGA cable with the XGA screen, could I break the i Series 1124's mainboard, the SVGA cable or the XGA screen panel? Or would it just not work/stay black?Display panel connector
I think the only possibility to check this is to disassemble the screen and to check the connector, but I really don't think that it is causing the problem.
What do you think about the problem and how to solve it?
I would be really happy if somebody here could answer (some of) my questions and/or maybe even has had this problem on his own 240Z/i Series 1124 and could share his solution here.
Thanks in advance,