Below is a step by step guide to fitting a new LCD of almost any kind.

Note the 3 main versions of game gear in the photo below

VA 1 = revisions 837-9130 / 837-9024 / 837- 8560

VA0 = revisions 837-7996 / 837-7719-01

VA4 and 5 are not compatible with new LCDs

First remove unneeded components 

Green = Fluorescent light parts, Red = brightness control parts for original LCD

VA0/VA1

Old lcd
FL
L2
R29/(R56 VA1)
R29/(R57 VA1)
fu1
fu2
Q2 (if fitted)
r34
r33
r32
c34/(c44 VA1)
q6
r38
r41
r43
r44 

Optional parts to remove

These parts are not powered anymore with the parts above being removed so you may leave them unless you want to remove them to make a little fluorescent light with the parts like me :)

VA0/VA1

• c33/(c70 VA1)
• q3
• q4
• c32/c69
• t1
• c70
• c71
• c44/(c54 VA1) 0.45uF
• c45/(c55 VA1) 0.45uF
• c35/(c45 VA1) 4.7uF

New wire connections

McWill and FunPlaying LCD connections

• t10 to t11
• t2 to LCD Csync
• CN1 pin16 and 18 to LCD gnd
• CN1 pin35 to LCD VCC
• CN1 pin42 to LCD GG/SMS
• LCD ribbon pin9 to LCD CL2
• LCD ribbon pin16 to LCD D1
• LCD ribbon pin18 to LCD D0
• LCD ribbon pin 20 to LCD DW
• LCD ribbon pin 39 to LCD D2
• LCD ribbon pin 57 to LCD D3
• FB1 to LCD CLK
• left of c29 to LCD but 1
• right of c30 to LCD but 2
• bottom of c28 to LCD but 3

McWill connections

Extra connections for McWill V2

 

• VR1 top pin to Vcc 5v
• VR1 second pin from top to LCD Backlight
• VR1 third pin from top to GND 0 v

Extra connections for McWill V3.1 and Chinese 3.1 LCD

• VR1 top pin to LCD PL1
• VR1 second pin from top to LCD PL2

Retrosix Clean screen pins

VA0/VA1

Notes. The D numbers on the back of the Clean screen are wrong. The D number after the ":" are the correct values.

• D0 to R57/R16 or to pin on ribbon 39 :  D2
• D1 to R56/R15 or to pin on ribbon 18:   D0
• D2 to R55/R14 or to pin on ribbon 57 :  D3
• D3 to R54/R13 or to pin on ribbon 16:   D1
• SMS to R31/R23 or to CN1 pin 42
• 2 to left of C29/C37
• Start to right of C30/C38
• Left to C26/C34
• Vsync to ribbon pin 20 
• Hsync to ribbon pin 9
• t10 to t11
• Wheel or BL to middel pins on the contrast wheel