First of all I need to buy a LCD driver board for my Surface, the part number for the screen is LTL123YL01-007 made by Samsung. I look around and found this board on Ebay.

This driver board is power by a Realtek RTD2795 that can drive a LCD up to 4K so it should drive the 2K Surface screen with no issue. 

The board features are :

• Tow HDMI and one mini-DP input
• 3.5mm jack audio output or internal speaker via the onboard audio amp. Nice!
• Seem to have a battery charging circuit but no mention on the listing...
• Can be powered from 5v to 12v via the barrel jack or micro USB.

Note that there is a smaller board connecting between the LCD panel and the FPC ribbon cable, this board is use for the LED backlight driver and convert physical connector to match the one on the LCD panel.

After ordering the LCD driver board, I found and ordered this Surface Pro 4 chassis on Ebay.

It came with the battery, maybe I can found a way to reuse it to power the screen later, it would be a nice feature.