Any notebook LCD LVDS experts?

[MN12BIRD]

So I have a Dell Vostro 3570 15.6" with a cracked screen. The screen was cracked but I could still see the image behind the crack. It had a 1366x769 resolution screen in it that broke. I ordered a 1920x1080 screen thinking the resolution didn't matter since it had the same 40-pin connector. I pulled out the old screen and plugged in the new screen. The plug went in nice and smoothly. When I turned the screen on it was just a black screen but the LED backlight came on. I put the old screen back in and the notebook started beeping 8 beeps. I tried again and got an all white screen (all white around the crack), so I tried putting the new screen back in. This time instead of all black (with the backlight on) it was all white!! The brightness up and down works. But it's just white. I swear this time I smelt a little something burning so I turned it off. Looking at the 40-pin cable it looks like 3 or 4 pins near the edge are burnt. I can hook up an external monitor and it works.

I guess I don't know enough about LVDS I would have thought putting in a higher resolution screen (since the 1080p screen was optional on the same notebook and the GPU can support it) would have been fine.

Does anyone know if and what, can be damaged from this or was it a coincidence and not from the screen being different resolution? Like I said the 1080p screen was the optional screen for the same model notebook.

 

[Warrgarbl]

I repair PCs and MSI notebooks for a living, and I can tell you that a white screen usually means a dead display. However, I have only recently switched to notebooks, but I could ask a coworker on monday who has a lot of experience with notebooks.

 

[MN12BIRD]

Yeah, I would have just thought the new screen was bad until I put the old one back in and now it only gives a white image. I think the cable got fried I'm just not sure if it's because of the new screen (either being wrong, or bad) or if I somehow damaged it while changing screens. I've just started repairing notebooks more lately and have changed about 10 LCD screens so far and never had this happen. But I've always ordered the exact same screen. This time I upgraded it and now am wondering if the cable has to match the screen? Doesn't seem right to me but LVDS is a much different system from DVI and the likes.

 

[Warrgarbl]

Well, since notebook screens get signal and power through one cable one would think that those are rated for different amperage. It could be possible that the possibly higher power draw of the newer display fried your cable. Maybe those two notebooks even had different motherboards with different LDVS-cables and sockets which can transmit more power. I'm purely guessing here, though.

What I can tell you, however, is that every MSI model has its own LVDS cable. I have never tried if you can use the LDVS cables in more than one model, but the fact that every model has a separate one should be a good indicator that it is unwise to use LVDS cables for other uses than they were intended for.

 

[MN12BIRD]

Yeah, you might be right. It looks like there's two different LVDS cables for this notebook. This one even says "HD" on the cable and maybe the other one says "Full HD" or something like that. I'm going to order a new cable and return this LCD panel for the lower resolution one and hope that I didn't fry anything related to the LVDS on the motherboard.

 

[de.das.dude]

power consumption of the screens can vary as well. so if the new one takes moere power you may have fried something.