iFixit - Answers With Device "PowerBook G4 Titanium Series"

PowerBook G4 Titanium Mercury: Ask for the logic board circuit diagram of 400Mhz model

Sun, 08 Feb 2026 19:45:22 -0700

I have a 400Mhz machine. I'm trying to repair a damaged machine with too high voltage. Although it can be turned on, there is a hidden injury. Can anyone provide the circuit diagram and resistance specifications for maintenance?Please provide a link that can be downloaded in China.

Model:M5884

Logic board:820-1251-A

我有一台400mhz机型。我正在尝试维修一台电压过高损坏的机器，虽然可以开机，但是有暗伤，有人可以提供检修的电路图与电阻规格吗。请提供一个可以在中国下载的链接

Model:M5884

Logic board:820-1251-A

⟐ Edited by author February 08, 2026 at 19:45 MST

PowerBook G4 Titanium Onyx: C1 capacitor for Powerbook G4 Titanium Onyx 550

Mon, 01 Nov 2021 10:40:08 -0700

I have an Onyx 550 showing no signs of life (light ring on power plug doesn't even light). Swapping in a known-good logic board confirms that something on the board is the problem. The C1 capacitor rattles when I shake the board, so I'm thinking it has dried out and simply replacing that might fix the problem. Do you know the full specs of the C1 capacitor?

Some specs I can read/see on the cap:

surface mount design
Rubycon (manufacturer)
220 uF
35 V
105 degrees C (apparently the top end of the rated operating temperature range)
NO144 (not sure if that's exactly what it says or what it means)
10 mm diameter and 10 mm high
presumably this is an aluminum electrolytic type

If I have all that right, then it narrows down the selection of caps at Mouser pretty well.

But there is at the least a question of the low-end temperature rating, and beyond that I would be happy to have someone confirm my overall assessment above.

⟐ Answer accepted November 01, 2021 at 10:40 MST

PowerBook G4 Titanium Onyx: PowerBook g4 titanium (550 mhz) not reading internal HDD

Sat, 16 Oct 2021 17:05:26 -0700

Looking to buy a powerbook g4 titanium, the biggest issue is that it doesn’t read an internal HDD, and only boots from an external drive. Is there a fix for this?

⟐ Commented October 16, 2021 at 17:05 MST

PowerBook G4 Titanium Mercury: PowerBook doesnt want to enter Open Firmware mod

Mon, 06 Sep 2021 07:16:10 -0700

Recently I bought PowerBook G4 Titanium very cheap and I want it for my personal collection. PowerBook was sold as “for parts”, so unfortunately I do not know much about its hardware condition (from the outside, it looks almost like brand new, almost no cosmetic dents or scratches).

When I power it on, only blinking question mark folder shows up, which means there is no OS, so I decided to open it up. I find out, that there is no hard drive inside, but I at least wanted to try run OS X installation. Since I dont own OS X installation CD and I dont have device with DVD drive, I decided to boot instalation of OS X from USB. I created OS X Tiger installation USB using TransMac and find guide which tell that I need to enter Open Firmware by pressing Command + Option + O + F and then Power button to allow boot from USB. But there is a problem. When I do it, nothing happen, PowerBook again shows only a questionmark folder. Also Option + PowerButton to see boot priority doesnt work.

What could be wrong? Would startup key combinations work, if I use external USB keyboard? (since I dont know if the build-in keyboard works). Couldnt be a problem that there is no hard drive inside?

Thank you very much for every answer

⟐ Commented September 06, 2021 at 7:16 MST

PowerBook G4 Titanium DVI: PowerBook g4 turns on cd and fans spin for a second and then turn off

Fri, 26 Feb 2021 06:44:17 -0700

Whe

This is what happens. It has no hdd(but it should show? sign, right) the ram was tested in other tibook and works. What should I do?

PowerBook G4 Titanium Onyx: Question mark folder strange issue

Wed, 12 Aug 2020 05:49:05 -0700

I have a G4 titanium that has a strange issue. I have a working hard drive in it. When I put it into target disk mode, I can boot other systems off the hard drive. When I try to boot the machine itself it gives a question mark folder. I have system 9 and OS X tiger installed on it. When I press alt at startup it shows only the OS X install. Clicking on it just resets the boot selector. Same thing with 10.3 and a cd. What should I do? Thank you

⟐ Answer accepted August 12, 2020 at 5:49 MST

PowerBook G4 Titanium DVI: P key needs new nipple; contact works. How to replace?

Thu, 06 Aug 2020 03:17:18 -0700

Hi all

I have a PB here with a P key not working. I've replaced the scissor mechanism but the problem is that the springy rubber nipple is damaged. When I press on the contact underneath, it does type Ps with apparent contentment.

I found a source at http://www.irithm.com/Mac.key.replacemen...

with pretty good instructions, but, while they can provide the nipple, they don't say how to install it. It appears to be glued onto the keyboard base. (ifixit only sells complete keyboards.)

Any suggestions?

⟐ Answer edited August 06, 2020 at 3:17 MST

PowerBook G4 Titanium Onyx: Anyone still know a source for batteries for this?

Mon, 13 Jul 2020 10:25:58 -0700

Anyone still know a source for batteries for this system?

PowerBook G4 Titanium Onyx - Model M8407 / 550 or 667 MHz G4 processor

⟐ Answer accepted July 13, 2020 at 10:25 MST

PowerBook G4 Titanium Onyx: Will LCD from a 1 GHz Titanium work in my 550 MHz?

Tue, 30 Jun 2020 02:27:44 -0700

Just what the title says. I've researched the models and their native resolutions are not the same. Still, I have to ask the question. Are they interchangeable?

⟐ Answered June 30, 2020 at 2:27 MST

PowerBook G4 Titanium Onyx: Replaced Onyx 1152x768 LCD with DVI 1280x854 LCD help with resolution

Tue, 30 Jun 2020 02:12:00 -0700

Hello, my LCD on my Titanium PowerBook G4 Onyx died and a friend had a spare LCD salvaged from a Titanium PowerBook G4 DVI. The original LCD resolution is 1152x768 but the new LCD is 1280x854.

The display works fine, but the extra pixels on the screen are quite strange (see picture). As you can see in the extra pixels to the bottom, the top of the screen ends up getting repeated (and actually updates as the top changes); the right side is filled with gibberish.

I tried seeing if I could use SwitchResX v. 4.3.6 (the last PPC version) to try and force it to use the full screen, but I can’t seem to figure it out. When I try to create a custom resolution of 1280x854, 60Hz, SwitchResX gives me a message that it is, “Not Activated - invalid?”.

I include the exported EDID as well.

As a note, when I boot my computer, before the OS loads in, like when I hold Option on startup to select my startup drive, it does use the whole screen. So I do know that it is possible for my PowerBook to drive the larger screen.

Hopefully someone can help me figure out how to use the whole screen?

Let me know if you need to see other details. Thanks so much!

Photo of the screen as I see it:

The Display Information from the LCD:

The Current (default) Resolutions for 1152x768 which says it is scaled:

I’m wondering if someone has a true Titanium PowerBook G4 DVI which could show me what the settings are for their 1280x854 resolution? Maybe I can then copy that and it will work?

The EDID for 1280x854 LCD:

EDID report generated by SwitchResX Version 4.3.6 (PowerPC - 32-bit) for display LCD Display

-----------------------------------------------------
------------------- RAW DATA ------------------------
-----------------------------------------------------
      0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F
-----------------------------------------------------
0  | 00 FF FF FF FF FF FF 00 00 00 00 00 00 00 00 00
1  | 0A 0A 01 01 0C 1E 17 BE E8 2D C9 A0 57 47 98 27
2  | 12 48 4C 00 00 00 01 01 01 01 01 01 01 01 01 01
3  | 01 01 01 01 01 01 00 00 00 FE 00 53 52 58 46 61
4  | 6B 65 45 44 49 44 0A 20 01 01 01 01 01 01 01 01
5  | 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
6  | 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01 01
7  | 01 01 01 01 01 01 01 01 01 01 01 01 01 01 00 78

-----------------------------------------------------
 <  00FFFFFF FFFFFF00 00000000 00000000 0A0A0101 0C1E17BE E82DC9A0 57479827 12484C00 00000101 01010101 01010101 01010101 01010000 00FE0053 52584661 6B654544 49440A20 01010101 01010101 01010101 01010101 01010101 01010101 01010101 01010101 01010101 01010101 01010101 01010101 01010101 01010078    >

-----------------------------------------------------
 {  0x00, 0xFF, 0xFF, 0xFF,  0xFF, 0xFF, 0xFF, 0x00,  0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,  0x0A, 0x0A, 0x01, 0x01,  0x0C, 0x1E, 0x17, 0xBE,  0xE8, 0x2D, 0xC9, 0xA0,  0x57, 0x47, 0x98, 0x27,  0x12, 0x48, 0x4C, 0x00,  0x00, 0x00, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x00, 0x00,  0x00, 0xFE, 0x00, 0x53,  0x52, 0x58, 0x46, 0x61,  0x6B, 0x65, 0x45, 0x44,  0x49, 0x44, 0x0A, 0x20,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x01, 0x01,  0x01, 0x01, 0x00, 0x78,     }

-----------------------------------------------------
    Valid EDID block: checksum passed

-----------------------------------------------------
------------------- MAIN EDID BLOCK -----------------
-----------------------------------------------------

EDID Version........1.1
Manufacturer........@@@
Product Code........0 (0000) (0000)
Serial Number.......00000000

Manufactured........Week 10 of year 2000
Max H Size..........30 cm
Max V Size..........23 cm
Gamma...............2.90

Display Supported Features:
---------------------------
    Power Management: Active off    Power Management: Suspend    Power Management: Standby

Display type:
-------------
    RGB color display
    Display is non continuous frequency
    Default color space is not sRGB standard

Input signal & sync:
--------------------
Analog input with:     0.700V / 0.300V
    Separate Sync
    Composite Sync

Color info:
-----------
Red x = 0.625  Green x = 0.280  Blue x = 0.155  White x = 0.283
Red y = 0.342  Green y = 0.595  Blue y = 0.070  White y = 0.298

Established Timings:
--------------------

Manufacturer Reserved Timings:
------------------------------

Standard Timing Identification:
-------------------------------

Monitor Description blocks:
---------------------------
    Descriptor #0 - ASCII data:
            SRXFakeEDID

    Descriptor #1 - Empty descriptor

    Descriptor #2 - Empty descriptor

    Descriptor #3 - Empty descriptor

PowerBook G4 Titanium DVI: How do I replace the internal speakers?

Mon, 18 May 2020 05:15:55 -0700

One of my internal speakers is distorting, how do I replace the internal speakers?

⟐ Commented May 18, 2020 at 5:15 MST

PowerBook G4 Titanium DVI: Cannot physically remove battery

Sat, 16 May 2020 17:52:51 -0700

My battery is stuck in the laptop. The release switch seems to be jammed. Can anyone help me with tips I might try to release it? I have had it in and out numerous times since acquiring the laptop but I guess the last time I installed it something went wrong.

⟐ Commented May 16, 2020 at 17:52 MST

PowerBook G4 Titanium Onyx: My hinge is super stiff on my TiBook G4 Onyx

Wed, 29 Apr 2020 20:28:51 -0700

Hello, I am new to the forums. I have an old TiBook G4 that I started using again after years of sitting in my closet. I used to use it a ton about 8 years ago I never remembered the hinge being that tight. Is there an easy fix, or do I need to do more extensive repair?

⟐ Answered April 29, 2020 at 20:28 MST

PowerBook G4 Titanium DVI: Can one upgrade the Wifi card in the PowerBook G4 Titanium?

Sat, 08 Feb 2020 13:54:26 -0700

I have a PowerBook G4 Titanium 1Ghz DVI with a Airport firmware 9.52. It seems to only have WEP under OSX 10.5.n. Is there any upgrade I can do/get to give me WPA?

⟐ Answer edited February 08, 2020 at 13:54 MST

PowerBook G4 Titanium Mercury: Linux on old Macs?

Wed, 25 Dec 2019 02:43:14 -0700

I want to extend the life of useful, easy to repair older Macs but need a modern OS for useful software. What I need to know is how practical installing Linux would be and which distros work best.

Chris: The latest version does not like my ROM but I am able to run 6.1 from the cd. After checking it out for a week or so if all goes well I will do a full install. Thanks to all for your input. Ralph

⟐ Answered December 25, 2019 at 2:43 MST

PowerBook G4 Titanium Series: Retrieve data from dead HD!

Fri, 16 Aug 2019 04:13:49 -0700

HOW CAN I GET DATA FROM A POWERBBOOK WHICH DOES NOT STARTUP? Hard drive is probably dead.

Please Help, lots of files!

⟐ Answer deleted August 16, 2019 at 4:13 MST

PowerBook G4 Titanium Onyx: How do I find replacement USB ports and replace?

Wed, 10 Apr 2019 12:58:29 -0700

Both ports are damaged. Need to find replacement parts and help in installing?

⟐ Commented April 10, 2019 at 12:58 MST

PowerBook G4 Titanium DVI: Excessive Fan noise after being on for a while?

Thu, 18 Oct 2018 05:29:55 -0700

I wanted to know if this is a known issue and what I can do about it. The fan is really working overtime and it is hard to work when hearing that noise. Also, I don't want this thing to catch on fire if it is possible for that to happen.

It is a Powerbook 867 titanium model. thanks!

⟐ Answer accepted October 18, 2018 at 5:29 MST

PowerBook G4 Titanium Series: Question mark on bootup.

Sat, 06 Oct 2018 09:24:35 -0700

Help. Titanium Powerbook4 will not boot. Black square appears with a question mark in the center. What does it mean?

⟐ Answer accepted October 06, 2018 at 9:24 MST

PowerBook G4 Titanium DVI: When replacing the secondary fan, must the PC card cage be removed?

Tue, 02 Oct 2018 06:33:46 -0700

The repair guide for replacing the 867MHz TiBook's secondary fan includes steps (32 & 33) for removal of the PC card cage. The PC Card cage is located on the opposite side of the logic board relative to the fan location. For the life of me, I am unable to determine why this step is necessary in the course of installing a new secondary fan. Is this a leftover (i.e. copy & paste?) from a different but related repair guide for this Powerbook model?

Side note: The repair guide specifies that a 4mm nut driver is required, but its only use is to assist in the removal of the PC Card cage.

Any clarification or assistance would be appreciated.

⟐ Commented October 02, 2018 at 6:33 MST