G5 Dual 2.5 CPU Power PC will not boot unless I remove the Plastic Sheild.

G5 Dual 2.5 CPU with 4 gb of memory will boot everytime if I take the plastic sheild out. I bought it from a guy who would turn it on then let it sit until the fans revved up after about 5 to ten minutes. I figured out that it would boot everytime if I removed the plastic sheild. Now I am trying to find a permanent fix for this issue.
Thanks for any assistance anyone can give.

I don't think its just a plastic shield and door - there is a contact switch that signals when these are removed and the fans rev up to a higher speed. My guess is its the higher speed of the fans that's keeping things cool during the power surge of the boot stage thats allowing it to startup.
When the doors are on and the fans are kept low there must be some hardware failure that is occurring during boot up - that seems to be prevented when speeding the fans up. And after the initial boot up power surge, things run cool enough that I can safely put the plastic shield and door back on and the computer keeps running fine (it ran OK all night).
I can think of no other logical explanation at this time.
Any other ideas?
What puzzles me, is I use this computer to do some heavy 3D graphic renders and have run it intensely for days at at time with absolutely no sign of failure during operation once its booted up. I've never had a freeze or anything like that. So when its so reliable during operation, why so fragile during boot up?

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Message was edited by: Thomas Bryant

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Message Edited by dwill122 on 12-10-2008 08:49 PM

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I v got some problem with my Z87 - unless I enter BIOS or boot menu(F11), I v got error message "Reboot and select proper boot device....".
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Quote from: ondrej.byrtus on 09-May-14, 01:57:58
Hi,
I v got some problem with my Z87 - unless I enter BIOS or boot menu(F11), I v got error message "Reboot and select proper boot device....".
When I enter BIOS(or boot menu), and dont change anything, exit&save it boots just OK.
The boot priority is simply the OS drive as 1st and everything else disabled. Every single driver is up to date (using supplied live uptade for board (v1.7 bios), and official inter drivers for OS drive (intel SSD), sound, graphics,... everything). Nothing but mouse, keyboard and LCD is connected to the PC. No DVDs inserted, no USB flash drives. Win7 64-bit clean(except drivers ofc) installation.
Any ideas what might be the problem?
I am under the impression that this not a fresh build...did you remove recently any drives....do you have dual boot....?

G5 Dual 2.5 CPU Power PC will not boot unless I remove the Plastic Sheild.

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