These are  cables that can be used together with universal and panel-specific controllers from China. If you have a suitable controller but the cable is not compatible with your screen's pinout, it won't work ;-( The headline is usable as a search term on eBay/Aliexpress/etc. so you can find a suitable listing.

FIX-30P-D6

A cable with the FI-X 30-pin connector that uses a single-llink 6-bit pinout - if you have a 1280x800 screen, this is what you'll be using, in all likelihood.

Cable pinout

FIX-30P-S6

A cable with the FI-X 30-pin connector that uses a dual-link 6-bit pinout - you need such a cable for anything above 1366x768.

Cable pinout

FIX-30P-S8

A cable with the FI-X 30-pin connector that uses a dual-link 8-bit pinout - this kind of cable is used for desktop LCD monitor screens. Funnily enough, this cable costs $3, and a MT561 board bundled with such a cable costs $5, which is to say, if you need such cables, you might as well get some MT561 boards to go with them.

Cable pinout

IPEX40P 1ch

A cable with the IPEX 40-pin connector that uses a single-link 6-bit pinout and allows you to interface the LED backlight pins on the same connector to your controller. If you have a 1366x768 LED screen, it's most likely to be using this cable.

Cable pinout

IPEX40P 2ch

A cable with the IPEX 40-pin connector that uses a dual-link 6-bit pinout and allows you to interface the LED backlight pins on the same connector to your controller. If you have an LED screen with resolution above 1366x768, it's most likely to be using this cable.

Cable pinout

DF14-20P

A cable with the DF14 connector that uses a single-link 8-bit (compatible with 6-bit) pinout. If you have an old 1024x768 CCFL screen, it might need such a cable.

Cable pinout

FIX-30P-D8 18.5

A cable with the FI-X 30-pin connector that uses a single-link 8-bit pinout. If you have a 18.5" 1366x768 panel for a desktop monitor, it will most likely use this cable.

Cable pinout