Have to hold down power button, Fans spin, but no display
I have to hold down the power button ( if i let go it just turns off), and the fans spin, and the led lights in the pc flicker, but there is no display. Im not sure if only the fans are getting power, and the rest of the pc is not....and im not sure why there is no display. I also have to hold down the power button the whole time for just the fans to spin but there is no display or anything else. what is the problem???
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The Powerbook G4 power button functions like a reset button if you hold the power button in for a few seconds until the computer powers down.
Hold the power button in for a few seconds (until you see the screen turn off/go black and hear the fans & hard drive stop spinning).
Press the power button again to turn your computer on.
If you have more trouble, you may need to boot in Safe Mode or "perform a Safe Boot": Press and hold down the "Shift" key immediately after you hear the start-up tone. Release the "Shift" key when the gray Apple icon appears on the screen.
Pretty sure both fans should turn. If the unit senses the fan not turning, it will shut down as you are describing. Try taking the label off of the fan so you can see the bearing, and put a couple drops of oil in there. This sometimes get them to turn freely again.
on some you hold down a button on the remote control while you turn power on .. you keep the button pressed for maybe 20 seconds .. i dont remember what button but probably fan on or light on .. the receiver acquires the code from the remote .. if you still have trouble i can probably find the specific instructions ..
Looks like the lights are on? Fans spin? Sounds like the harddrives spinning? The power supply is bad. has just enough power to light lights, and spin fans, but not enough for the processor. (No beep sounds, because BIOS hasn't done a memory count. It's not going to)
ALL the lights use less than 1 Watt. EACH fan uses 2 to 3 Watts. The harddrive just sitting there spinning, uses about 5 watts.
Processors use 55 Watts to 125 Watts. Depends on the processor. Not enough power to turn the processor on, the computer won't work. Computer isn't working there isn't anything to turn the monitor on. No Signal.
Call up the 'Integration Menu" - the fans can be switched between 'auto' and 'full speed'.
To do this switch the display into standby. If the standby light flashes 4 times it is indicating a fault in the Thermal Sensor Assembly which will explain why your fans aren't working. With the display in standby press the menu button and within 3 seconds press the power button. The display will turn on with the integration menu. Select the option tab and scroll down until you see 'fan control' - press 'set' to toggle between 'auto' and 'max'. When you select 'max' the fans will run at full speed within a few seconds. The fans are a bit noisey at full speed so you may want to look into replacing the sensor eventually.