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[crashnburn]

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[smugiri]

Aside from the obvious assumption that the Intel card can be able to drive an SXGA panel which may not be true, I think that there may be a difference in the LCD cables for the 2 machines. I think I read somewhere on this forum that one uses a 4 wire cable while another uses a 3 wire cable.

Try searching in the T4x forum for LCD posts with those numbers to see what comes up.

[christopher_wolf]

There are, indeed, differences between the two cables although I don't remember the exact differences. I have, however, seen the Intel card driving screens larger than the SXGA+ on that T42's screen, so that probably isn't it. As far as I know, there is nothing that should inherently prevent the Intel card from driving a 14.1" SXGA+ TFT LCD display.

[crashnburn]

Aside from the obvious assumption that the Intel card can be able to drive an SXGA panel which may not be true, I think that there may be a difference in the LCD cables for the 2 machines. I think I read somewhere on this forum that one uses a 4 wire cable while another uses a 3 wire cable.

Try searching in the T4x forum for LCD posts with those numbers to see what comes up.

I did search several ways after your suggestion but cant seem to find anything that helps.

Do you think you might be able to help? Since you seem to have some recollection / context on this issue.

[luns]

Did you swap entire assemblies (panel, cover, cable, inverter, hinges), or just the panels alone? What you've described is consistent with swapping just the panels: the LCD cables need to go with the panels as the SXGA+ and XGA cables are different.

The XGA cable has one data channel, but the SXGA+ cable has two. If you use the XGA cable with the SXGA+ panel, the channel for odd pixels will work, but even pixels are left floating, and it's basically random what those pixels wake up as when you power up. An XGA panel on an SXGA+ cable would work fine - while the extra channel is wired, the panel doesn't make use of it.