Help needed for determining the problem with my LCD driver

[elepo]

Hi everyone.
My LG L1720B 17" LCD monitor died a few weeks ago. I'm a "hobbyist" so I decided to see if I can repair it myself. I had repaired it once before by replacing bulged capacitors but this time it looks like the power supply and the main board(the one with the MCU and the connectors) are both damaged.
So I decided to buy a main board for it and power that with an external power supply to see if the LCD panel itself is alive.
I bought this cheap chinese LCD controller board and tried hooking it up with the LCD panel. (It was very difficult because only the board itself was available where I live and I had to connect everything manually).

Tho after wiring it to the LCD panel board and connecting it with a VGA cable to my laptop I got this extremely noisy and jumpy picture:



However when the VGA cable is not connected to my laptop I get a very clear OSD screen:



The first thing I would suspect would be that the LVDS cables are mismatched or there's something wrong with either boards, but since the OSD is working fine I'm confused as to why I can't get a clear picture when I connect the VGA cable to my laptop.
Also, I can hack the original mainboard into almost working by replacing a damaged PNP transistor with a short. When I do that I get an almost noiseless picture, but the picture is extremely pale and barely visible.
So I suppose the LCD panel is healthy?

Here's a link to an Imgur album where I have added more pictures and descriptions. I didn't want to occupy too much space here.

More info:

Monitor: 17" LG Flatron L1720B (~13 years old).
Cable: Healthy VGA cable that works with other monitors.
Original main board: https://www.ebay.co.uk/itm/302043220118
Replacement main board: MT561-MD v2.1
LCD Panel: LM170E01-TLA4

[fzabkar]

Here is the service manual, just in case you need it …

http://www.jordansmanuals.com/Default.aspx?Brand=LG&Product=Monitor&Model=L1720B

[kjr18]

Panelook site reports this panel as 1280x1024 in pixels and with 8 bit 2 channel lvds, but without known voltage level. I guess you could try setting jumpers at C and G position and voltage at 3.3V. You can see what parameters you can set on this table on the back side: resolution, bits and channels. If this won't work, you can try 5V. This might work, seeing as this panel is at least 13 years old.


And something is wrong with this resolution shown on OSD...