Compaq MV7540 Service Manual page 18

Enter into factory mode to adjust brightness,
contrast and look if the picture is normal.
NO
Check if the voltage of filament
is normal.
NO
YES
Check the voltage of G2 is
200v.
NO
Check the if tube socket and tube
pin are good.
NO
YES
Adjust the G2 VR of FBT
and look if the picture is
normal.
Section1
YES
If it can be adjusted to
normal picture and stored.
Check power-saving circuit and 6.3Vpower supply
Replace the tube
socket
Dark picture
Replace CRT
18
NO
Replace IC102
YES
Adjust the G2 VR of FBT and
look if the picture is normal.
NO
Check R880, FB809, FBT.
HP MV7540