Replaced Onyx 1152x768 LCD with DVI 1280x854 LCD help with resolution

Hello, my LCD on my Titanium PowerBook G4 Onyx died and a friend had a spare LCD salvaged from a Titanium PowerBook G4 DVI. The original LCD resolution is 1152x768 but the new LCD is 1280x854.

The display works fine, but the extra pixels on the screen are quite strange (see picture). As you can see in the extra pixels to the bottom, the top of the screen ends up getting repeated (and actually updates as the top changes); the right side is filled with gibberish.

I tried seeing if I could use SwitchResX v. 4.3.6 (the last PPC version) to try and force it to use the full screen, but I can’t seem to figure it out. When I try to create a custom resolution of 1280x854, 60Hz, SwitchResX gives me a message that it is, “Not Activated - invalid?”.

I include the exported EDID as well.

As a note, when I boot my computer, before the OS loads in, like when I hold Option on startup to select my startup drive, it does use the whole screen. So I do know that it is possible for my PowerBook to drive the larger screen.

Hopefully someone can help me figure out how to use the whole screen?

Let me know if you need to see other details. Thanks so much!

Photo of the screen as I see it:

The Display Information from the LCD:

The Current (default) Resolutions for 1152x768 which says it is scaled:

I’m wondering if someone has a true Titanium PowerBook G4 DVI which could show me what the settings are for their 1280x854 resolution? Maybe I can then copy that and it will work?

The EDID for 1280x854 LCD:

EDID report generated by SwitchResX Version 4.3.6 (PowerPC - 32-bit) for display LCD Display

-----------------------------------------------------
------------------- 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 00 00 00 00 00 00 00 00
1  | 0A 0A 01 01 0C 1E 17 BE E8 2D C9 A0 57 47 98 27
2  | 12 48 4C 00 00 00 01 01 01 01 01 01 01 01 01 01
3  | 01 01 01 01 01 01 00 00 00 FE 00 53 52 58 46 61
4  | 6B 65 45 44 49 44 0A 20 01 01 01 01 01 01 01 01
5  | 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
6  | 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
7  | 01 01 01 01 01 01 01 01 01 01 01 01 01 01 00 78

-----------------------------------------------------
 <  00FFFFFF FFFFFF00 00000000 00000000 0A0A0101 0C1E17BE E82DC9A0 57479827 12484C00 00000101 01010101 01010101 01010101 01010000 00FE0053 52584661 6B654544 49440A20 01010101 01010101 01010101 01010101 01010101 01010101 01010101 01010101 01010101 01010101 01010101 01010101 01010101 01010078    >

-----------------------------------------------------
 {  0x00, 0xFF, 0xFF, 0xFF,  0xFF, 0xFF, 0xFF, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x0A, 0x0A, 0x01, 0x01,  0x0C, 0x1E, 0x17, 0xBE,  0xE8, 0x2D, 0xC9, 0xA0,  0x57, 0x47, 0x98, 0x27,  0x12, 0x48, 0x4C, 0x00,  0x00, 0x00, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x00, 0x00,  0x00, 0xFE, 0x00, 0x53,  0x52, 0x58, 0x46, 0x61,  0x6B, 0x65, 0x45, 0x44,  0x49, 0x44, 0x0A, 0x20,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x00, 0x78,     }

-----------------------------------------------------
    Valid EDID block: checksum passed

-----------------------------------------------------
------------------- MAIN EDID BLOCK -----------------
-----------------------------------------------------

EDID Version........1.1
Manufacturer........@@@
Product Code........0 (0000) (0000)
Serial Number.......00000000

Manufactured........Week 10 of year 2000
Max H Size..........30 cm
Max V Size..........23 cm
Gamma...............2.90

Display Supported Features:
---------------------------
    Power Management: Active off    Power Management: Suspend    Power Management: Standby

Display type:
-------------
    RGB color display
    Display is non continuous frequency
    Default color space is not sRGB standard

Input signal & sync:
--------------------
Analog input with:     0.700V / 0.300V
    Separate Sync
    Composite Sync

Color info:
-----------
Red x = 0.625  Green x = 0.280  Blue x = 0.155  White x = 0.283
Red y = 0.342  Green y = 0.595  Blue y = 0.070  White y = 0.298

Established Timings:
--------------------

Manufacturer Reserved Timings:
------------------------------

Standard Timing Identification:
-------------------------------

Monitor Description blocks:
---------------------------
    Descriptor #0 - ASCII data:
            SRXFakeEDID

    Descriptor #1 - Empty descriptor

    Descriptor #2 - Empty descriptor

    Descriptor #3 - Empty descriptor