Download switchresX, launch it in system preferences and then export the DDC
file -- there will a model number at the end of the DDC page and we can find out more from there.
Here is the file. This is the LG screen that was used in the past, no?
That's my guess.
DDC block report generated by SwitchResX version 3.8.7 for display
Color LCD
-----------------------------------------------------
------------------- RAW DATA ------------------------
-----------------------------------------------------
0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------------
0 | 00 FF FF FF FF FF FF 00 06 10 A3 9C 00 00 00 00
1 | 00 13 01 03 80 21 15 78 0A F5 95 A3 55 4F 9C 26
2 | 0F 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
3 | 01 01 01 01 01 01 AB 22 A0 A0 50 84 1A 30 30 20
4 | 36 00 4B CF 10 00 00 18 00 00 00 01 00 06 10 30
5 | 00 00 00 00 00 00 00 00 0A 20 00 00 00 FE 00 4C
6 | 50 31 35 34 57 50 34 2D 54 4C 41 31 00 00 00 FE
7 | 00 43 6F 6C 6F 72 20 4C 43 44 0A 20 20 20 00 00
-----------------------------------------------------
< 00FFFFFF FFFFFF00 0610A39C 00000000 00130103 80211578 0AF595A3 554F9C26 0F505400 00000101 01010101 01010101 01010101 0101AB22 A0A05084 1A303020 36004BCF 10000018 00000001 00061030 00000000 00000000 0A200000 00FE004C 50313534 5750342D 544C4131 000000FE 00436F6C 6F72204C 43440A20 20200000 >
-----------------------------------------------------
Valid EDID block: checksum passed
-----------------------------------------------------
------------------- MAIN EDID BLOCK -----------------
-----------------------------------------------------
EDID Version........1.3
Manufacturer........APP
Product Code........41884 (A39C) (9CA3)
Serial Number.......00000000
Manufactured........Week 0 of year 2009
Max H Size..........33 cm
Max V Size..........21 cm
Gamma...............2.20
Display Supported Features:
---------------------------
Display type:
-------------
RGB 4:4:4 & YCrCb 4:4:4 Color Encoding Formats
Display is non continuous frequency
Default color space is not sRGB standard
Preferred timing mode includes Native Pixel Format
Input signal & sync:
--------------------
Digital Input
Color Bit Depth is undefined
Digital Interface is not defined
Color info:
-----------
Red x = 0.640 Green x = 0.310 Blue x = 0.150 White x = 0.313
Red y = 0.335 Green y = 0.610 Blue y = 0.060 White y = 0.329
Established Timings:
--------------------
Manufacturer Reserved Timings:
------------------------------
Standard Timing Identification:
-------------------------------
Monitor Description blocks:
---------------------------
Descriptor #0 is Timing definition:
Mode = 1440 x 900 @ 59.901Hz
Pixel Clock............. 88.75 MHz Non-Interlaced
Horizontal Vertical
Active.................. 1440 pixels 900 lines
Front Porch............. 48 pixels 3 lines
Sync Width.............. 32 pixels 6 lines
Back Porch.............. 80 pixels 17 lines
Blanking................ 160 pixels 26 lines
Total................... 1600 pixels 926 lines
Scan Rate............... 55.469 kHz 59.901 Hz
Image Size.............. 331 mm 207 mm
Border.................. 0 pixels 0 lines
Sync: Digital separate with
* Negative vertical polarity
* Negative horizontal polarity
Descriptor #1 is Manufacturer specific data (not interpreted here)
Descriptor #2 is ASCII data:
LP154WP4-TLA1
Descriptor #3 is ASCII data:
Color LCD
. I like my expresscard slot instead of the new SD slot (I know I will be using CF and possibly esata adapters on it), so in that way I'm glad of my current version. 
