Symptom Charts Startup

Remove RAM card (if present) and restart computer. If startup sequence is normal, replace RAM card and retest. Reseat RAM card and check connection. Remove floppy drive from media bay and restart computer. If startup sequence is normal, insert floppy drive and retest Disconnect hard drive cable and restart computer. If startup sequence is normal, reconnect cable and retest. Startup failure Upgrade to System Enabler 1.2.1 or later. Refer to Apple occurs when using Software Updates on Service...

PRAM and Power Manager Reset

Caution Resetting parameter RAM (PRAM) erases the contents of the RAM disk, if there is one. Resetting PRAM also restores the default settings in most control panels. After you reset PRAM, be sure to check any custom settings for the desktop pattern, memory, network, AppleTalk, trackpad, power conservation, and so forth. Reset zap PRAM from the shutdown state. Note that resetting PRAM when the computer is shut down also resets the power manager. Follow these steps to reset PRAM 1 Unplug the AC...

Power Information

Use the following information on the batteries and power adapter to ensure the best use of these systems and to recognize and prevent problems. For instructions on battery and power adapter verification, see the Additional Procedures chapter of this manual. For a matrix of batteries that work with specific models of the PowerBook family of computers, select the PowerBook Battery Matrix located in Hardware Compatibility Charts. The following are guidelines for properly handling the PowerBook 190...

PC Card Door PCMCIA

Before you begin, remove the following Power Supply Board 5300 Series only Video Board 190 Series Option Hinge Pin 1 Door Retainer O-Ring Hinge Pin 1 Door Retainer O-Ring 1 Remove the rubber door retainer O-ring. 2 Carefully bow the top piece of the door until the side hinge pin is free. 3 Repeat step 2 to remove the bottom piece of the door.

Display Housing

Before you begin, remove the following 1 Using a plastic swizzle stick, remove the 2 product name plates to expose the underlying screws. Note As part of the PowerBook 1 90 5300 Repair Extension Program, the original bottom screws on some color displays were replaced with patchlock screws. 2 Remove the 4 screws holding the bezel to the back display housing. 3 Turn the display over, face down. 4 Starting at the bottom of the display housing, using a flat-blade screw -driver, carefully pry the...