PMU reset needed:

If your laptop fails to start up, the first thing to try is to reset the PMU. Flip up the keyboard (see the Fixit Guides if you don't know how) and press the reset button on the logic board located beneath where the escape key. After resetting the PMU, try booting the computer again, if you're lucky, you'll have a working machine again.

Bad power adapter or battery:

If your power adapter is bad, the computer will run off a battery, but it won't charge. If your battery is bad, the computer may shut off immediately when the AC adapter is unplugged. The easiest way to test this is to borrow either a battery or power adapter to test in your machine.

Compatible power adapters are IF113-000, IF113-009, IF113-018, and IF113-035.

Compatible batteries include IF121-024 and IF121-054.

Bad DC-in board:

If your DC-in board is bad, you will not be able to start your computer when it's plugged into the wall. It will likely still work if you have a charged battery. The light on the power adapter will probably not light up at all. (Some power adapters do not have lights, so this may not apply to your computer.) Fourtunately, the DC-in board is not integrated onto the logic board on the DVI, so you can simply replace the DC-in board.

Bad logic board:

If nothing else fixes the problem, you likely need a replacement logic board. We carry logic boards for every G4 Titanium DVI model. There are four different speeds of Titanium DVI logic boards, all of which are interchangeable: 667 MHz, 800 MHz, 867 MHz, or 1 GHz.

Bad inverter

The most likely cause of no backlight is a non-working inverter board. The inverter board converts DC power from the computer to AC power to be used by the LCD backlight. We offer the inverter board as well as free installation instructions. If the inverter doesn't fix the problem, double check the cable that runs from the inverter to logic board as well as the cable which connects the inverter to LCD.

Bad Display

If replacing the inverter board didn't fix the problem, it's possible the backlight in the display is defective. Since the display assembly is tightly glued together, its nearly impossible to replace just the backlight of the LCD. We do offer complete LCD assemblies as well as installation instructions.

Bad logic board

This is rare, but occasionally a bad logic board can cause the backlight not to work. There are four different speeds of Titanium DVI logic boards, all of which are interchangeable: 667 MHz, 800 MHz, 867 MHz, or 1 GHz. We have free installation instructions to make installing your new logic board a painless operation.

Broken hinge:

Alas, hinges on the Titanium series were not made out of titanium. This oversight by Apple means that broken hinges are an all-too-common problem on Titanium PowerBooks. Hinge repair is one of the few installations best left to professionals. Apple glued the display assembly tightly together, making opening the display without damaging the thin metal casing very difficult. For those who know exactly what they're getting into, we do offer brand-new (and stronger) steel hinges for both the left and right sides. Please note that we do not have installation instructions available for these hinges.

A much easier installation is replacing the entire display assembly, which includes the hinges. We do offer complete LCD assemblies as well as installation instructions.

Worn latch assembly in upper case:

The Titanium is held shut with the combination of a hook extending from the display assembly and a catch in the upper case near the trackpad. Over time, the hook often wears away the metal catch, preventing the hook from latching the computer securely shut. If the catch in the upper case is worn, you can simply replace the latch.

Broken or damaged latch hook in display assembly:

If the latch hook that is located at the top of the display assembly is damaged or broken, there's no easy way to fix the problem. An improvised latching mechanism such as a rubber band may be your best bet. If you know what you're doing, you can attempt to take apart the display assembly and fix the problem. This route is not recommended unless you know exactly what you're getting into.

A much easier installation is replacing the entire display assembly, which includes the latch hook. We do offer complete LCD assemblies as well as installation instructions.

Poor quality paint:

Unfortunately there is no easy solution to this problem. There are third-party products offered for paint touch-up on the Titanium series, but we have not had good success with paint touch-up products. The design of this model PowerBook means that if you want to fix the paint chipping, you'll need to replace the upper case. It is not possible to replace only the lighter outer trim section as the two sections of the upper case are glued together.

Ports/Audio:

If you lose firewire, USB, audio or ethernet, the only thing to blame is the logic board. Because there are many components of the logic board, numerous possible symptoms indicate logic board failure. Any one of these components can fail and leave the others intact. If you lose the use of another component of your computer, such as the display, battery, or even power, and replacing the apparently non-working part didn't fix the problem, it is possible that the logic board may need to be replaced.