MY MAC G4 ISNT READING MY MONITORS. WHAT DO I DO?

Question

MY MAC G4 STOPED READING MY MONITORS WHAT DO I DO? PLEASE HELP ME SOMEBODY

Answer 1

You could try a reset of the Power Management Unit (PMU)
to see if that gets the connections between the logic board
and video/graphics card to work again. There is some degree
of troubleshooting involved with performing the reset.
•About NVRAM and PRAM (reset & info)
http://support.apple.com/kb/HT1379
•Resetting PMU on PowerMac G5, PowerMac G4, PowerMac G3:
http://support.apple.com/kb/ht1939
other reset topic answers via search result - vary to suit
https://www.google.com/?gws_rd=ssl#q=PowerMac+G4+PMU+reset
If the graphics card has failed, then you'd have to try & see if a
swap to use another one known good. Check shared connection
and other cables that may be problematic, replace as part of a
troubleshooting scheme to eliminate all probable causes.
In some models, the PRAM battery on the logic board can affect
several things, so if that proves to be weak or dead, a new one
could prove helpful in troubleshooting and later in actual use.
If you have a different display, you could try & use that as part of a
troubleshooting effort, since any traction here could prove helpful.
Not sure of an exact idea that would be a sure thing.
So hopefully the main PMU or PRAM reset ideas help
unless there is a hardware failure in the computer...
Good luck!