Re: PM G4: Old CPU back in, no boot
On May 15, 2012, at 9:26 AM, Valter Prahlad wrote: Il giorno 14-05-2012 15:58, Valter Prahlad ha scritto: Today I took out the upgrade CPU, and I put back in the old, original Apple 667 MHz CPU (I applied thermal grease, connected the CPU fan wire, pressed the PMU switch). BTW, does anyone know if the CPU fan wire (in the original PM G4 DA 667 MHz) goes to a connector on the processor card? I wonder if it goes connected to a place on the motherboard instead, but I could not find a suitable connector there. (I was wondering if the no boot could be related to the CPU fan not spinning) Have you checked the socket for any deformed pins? also the processor usually takes a little to a lot of force to seat it. I would spray the connection with a residue free contact wash first. Also reseat the RAM John Carmonne Placentia CA 92870 From iMac Core Duo 2.0 -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PM G4: Old CPU back in, no boot
Il giorno 14-05-2012 15:58, Valter Prahlad ha scritto: Today I took out the upgrade CPU, and I put back in the old, original Apple 667 MHz CPU (I applied thermal grease, connected the CPU fan wire, pressed the PMU switch). BTW, does anyone know if the CPU fan wire (in the original PM G4 DA 667 MHz) goes to a connector on the processor card? I wonder if it goes connected to a place on the motherboard instead, but I could not find a suitable connector there. (I was wondering if the no boot could be related to the CPU fan not spinning) -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PM G4: Old CPU back in, no boot
Il giorno 14-05-2012 16:09, Len Gerstel ha scritto: Problem is, the Mac doesn't boot anymore. When I press the power button, it doesn't make any sound at all (no boing, no beep), and the screen stays black. It sounds like it may be a bent pin on the old processor. I would double check tham. That was it! There were two bent pins: once I straightened them, everything went smooth as silk. Thank you very much; I wouldn't have never guessed! :-) Valter -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PM G4: Old CPU back in, no boot
On May 14, 2012, at 9:58 AM, Valter Prahlad wrote: Today I took out the upgrade CPU, and I put back in the old, original Apple 667 MHz CPU (I applied thermal grease, connected the CPU fan wire, pressed the PMU switch). Problem is, the Mac doesn't boot anymore. When I press the power button, it doesn't make any sound at all (no boing, no beep), and the screen stays black. Fans are running, the power button is lit, and that's it. Any idea how to troubleshoot this? Thanks in advance, Valter It sounds like it may be a bent pin on the old processor. I would double check tham. Len -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
Re: PM G4: Old CPU back in, no boot
Reseat the CPU and try the upgraded CPU and check if the heat sink is securely mounted. Sent from my iPhone On May 14, 2012, at 6:58 AM, Valter Prahlad valter.prah...@fastwebnet.it wrote: Having acquired a G5, I'm in the process of selling my old PowerMac G4 DA. It has an upgrade CPU (OWC Mercury 1,4 GHz), that I'm selling on its own. Today I took out the upgrade CPU, and I put back in the old, original Apple 667 MHz CPU (I applied thermal grease, connected the CPU fan wire, pressed the PMU switch). Problem is, the Mac doesn't boot anymore. When I press the power button, it doesn't make any sound at all (no boing, no beep), and the screen stays black. Fans are running, the power button is lit, and that's it. The HD doesn't seem to be accessed (no whirring from the drive's heads). One week ago, I used this Mac (with the upgrade CPU still in), and it had no problem -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to g3-5-list@googlegroups.com For more options, visit this group at http://groups.google.com/group/g3-5-list
