Apple iMac G5 ALS repair of a logic board in a system that has power but no chime or no video.

http://doubleclickittofixit.com/category/helpful-tips/ has a number of informative blogs for testing and troubleshooting your laptop.

Category:

Science & Technology

Tags:

• Apple
• iMac
• Ambient Light
• 661-3613
• Intel
• ATI
• chipsets
• reflow
• repair
• ALS iMac G5 20inch
• A1076-M9845LL-White-ALS
• 820-1747
• HPREFLOW technique
• HPREFLOW
• hpreflow.com
• HP REFLOW
• doubleclickittofixit
• double click it to fix it
• doubleclickittofixit.com

[OnPlanet12]

my i mac g5 ppc 4th motherboard light dosent turn on can u tell me what that means and about how much will it take to fix it

[BGAReflow]

@OnPlanet12 If I remember correctly on a later model iMac the fourth light is the red warning for overheating light. So what you would want is a 1, 2 LED then the 2 LED turns off and LED 3 turns on. That signifies a boot process.

Now on ALS models the boot up is different and the lights stay on and you want a LED 4 light to turn on. Usually with an ALS model your LED 4 light will not post if the video card is bad. They are Mini PCI-E cards.

We charge $125.00 to fix those issues.

[BGAReflow]

@3DVFXECTOR Yes

[3DVFXECTOR]

I also have a similar iMac. When I boot the iMac, I get repetitive Chime. Could this be the chipset?

[BGAReflow]

@3DVFXECTOR A repetitive chime is displaying a system reboot on an iMac so if the system continues to chime at a regulated interval, ie. every 5 seconds or 2 minutes and does it constantly, I will say it is displaying a chipset issue. This would be the same displayed issue the DV2000, DV6000, DV9000, and TX1000 HP systems display with a failed chipset. They boot, show blue lights, ie. like the iMac chime, then turn off and repeat the cycle.

[3DVFXECTOR]

@BGAReflow

The Imac that I have pci-express display card, not onboard. So when I reflow it it should work? The reflow tempratures on what does it depend?

Thanks

[3DVFXECTOR]

@BGAReflow I have an Imac intel 20" version with separate videocard (not ONboard). Then will this mean that Co-CPU and the other Chipset Fails? Many thanks

[3DVFXECTOR]

Hi,

I have similar like this one, and have the next issue. When I power up the system I hear the Chime (but it repeat). Can this be the chipset?

Many thanks

[BGAReflow]

@forestmanify We use ACHI and Hakko systems along with our simple repair system.

[forestmanify]

@BGAReflow Sorry for the late reply, =), I am using a Hot Air station to re-flow the Northbridge, but am actually planning on just completely removing the chip all together and re-balling it correctly, as I haven't been satisfied with the reflow, and I don't have access to an IR station at this time. Any recommendations on what model of IR heater to purchase?