Boot only with fan unlocked

hello, my pc have worked properly for 1 month. now, impossible to boot correctly.
The led's are all green directly.
After investigations, the pc boot only when the fan (original intel fan) is unlocked.
P4 2,8 c + 2X 256 pc3200 samsung, xp pro pack 1.
heeeeeeeeeelp me.
best regards.

Don't worry about it: I'm (sigh) American, but I lived in Paris for six months, so I’m less intolerant of the language barrier than some. Where in France are you from? (Just curious). I guess in your case it was diagnostic, but usually there’s no good reason to start a computer without the heatsink on the CPU. Try it with an alternate fan. Now that I think of it, I’m reasonably sure you can’t actually fry your processor by doing so (I’m fairly tired at this point—rampant insomnia—so forgive me), but the processor will throttle *way* back. If you can try to describe your problem in more detail, I or others here will be happy to do what we can. I’d offer to help translate, but at this point my French is likely so much worse than your English as to make that not even worth the while.

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Ensure the computer's RAM is fully seated down, and then try resetting the PRAM by holding down options-command-P-R at boot. The computer will make the boot chimes and then reset and chime again. When it chimes the second time release the keys and let the thing boot normally. Hopefully that will let it recognize the RAM.

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Quote from: blazing storm on 03-June-05, 05:52:21
Looks like a Memory/Motherboard problem but I've never heard of it before or a low powered power supply could stop it recognising the 4GB so may be worth borrowing a more powerful one to test and see.. all out of ideas on this now
You were right. I borrowed a Rosewill RE501-BLK 3.3v@28a, 5v@30a, 12v@34a, 500W and now I don't have to reset the CMOS to boot! The case power switch still doesn't work--I have to turn off the PSU and turn it on again to boot--but others in this thread have suggested improper wiring of the switch which I'll check out. But I certainly can live with this since the PSU power switch is at least external to the case (as opposed to the CMOS reset switch). Now I'll go to the PSU thread to pick out a new PSU.
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Macbook pro retina, boots only with 5 gigs of ram free?

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Assuming that you have Mavericks installed as your OSX, memory pressure is the important criteria, not so much the amount. Mavericks will actually try to use as much as is available. If you see green, RAM usage is acceptable:
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Ciao.

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Can you please provide details on the exact model?
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Boot up into OS ONLY with D key hold?

hi all, first, thx for reading the problem that i have.
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hold Shift (Safe Boot mode) - gray screen with nothing
hold v (Verbose mode) - gray screen with nothing
hold option (select volume) - no volume appears, but i see the cursor
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Reset the PRAM - not help
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I'm trying to think now if it is worth running into the store to have them look at the machine, because I think I localized the problem - putting incorrect discs into the machine and trying to get it to run. Might call them again tomorrow to see what they think (just because going to the Apple Store is really out of my way).

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how I can unlock an encryption on my macbook pro ? device is not starting only with sos sound & black screen I don't know what should do ?

You have to take the computer to the Apple store.
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Pavillion dv6-3216us win7 clone hard drive worked only with HDClone 4.1

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Since two weeks I experience freezes at different up-and-runnng time. It could happen at grey startup screen (after a while fan goes wild), could be after some minutes working in a full booted user environment.
I run AHT several times, no error reported. When I took out all RAM except for Apple RAM, it still freezes at some time.
Now, by random, my machine starts sometime with only one processor and is stable for hours (only the fan runs higher and cpu load is most of the time near 100 percent). Activity shows one bar only, System Info says: Number of CPUs=1. I have no idea which processor runs and which "sleeps" deadly. iStat tells only about CPU A as having a temperature, the fans of CPU A run higher, but the fans of CPU B run also on a lower level.
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My PowerMac G5 Dual 2.0 also has this problem.
It all started one sad afternoon a month or so ago. I noticed that my computer was on and the fans were on full speed. As soon as I moved the mouse to shut it down, I got the wheel of death!
I had no choice but to do a force shutdown.
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Pressing the 'Option' key did gave me the screen where one can select where to boot from; the main HD, booting CD, etc. but none of the worked.
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I pressed the PMU button = no change
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When I pressed the 'T', i get the FireWire logo and I'm able to boot my G5's HD using my PowerBook G4. But when I put my G4 on firewire mode and try to boot my G5 by selecting the OS of the G4, I still get the frozen screen, so the problem is not with the HD.
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Since I got this problem, It has work normal only 3 occasions but no longer than an hour until the fans go crazy and freezes.
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This feels part of an strategy called "Get a(nother) Mac". Where comps are design to last just a little after AppleCare expires and then BOOM! no choice but to spend some serious cash on fixing it or use that money plus more to get one of the resent mac which have had some changes since one bought the mac that just went to apple heaven.
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I took apart my G5 today and I'm not sure but it seems that the heatsinks might use some kind of gas to cools the CPUs or Chips and I think that gas is over.
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Here's of the heatsink for the PPC G5 2.0
http://img186.imageshack.us/img186/2642/g5heatsinksw5.jpg

Please Help :( iMac 20" refuses to boot up with anymore than 1gb ram?

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When I go to system report and go under memory it shows this:
BANK 0/DIMM0:
Size:          1 GB
Type:          DDR2 SDRAM
Speed:          667 MHz
Status:          OK
Manufacturer:          0xCE00000000000000
Part Number:          0x4D342037305432393533435A332D43453620
BANK 1/DIMM1:
Size:          Empty
Type:          Empty
Speed:          Empty
Status:          Empty
Manufacturer:          Empty
Part Number:          Empty
Serial Number:          Empty
Any help I can get would really be appreciated. Thanks in advance
ALSO...Here is also a pic of the system log right before it happened. It even changed the date to 07/2014????
I have some more if needed???????????????
<Personal Information Edited by Host>

The Memtest just completed and came back like this? It only test the single 1gb chip because anything more in this computer it won't go past the black screen with solid white power light.
Memtest version 4.22 (64-bit)
Copyright (C) 2004 Charles Cazabon
Copyright (C) 2004-2008 Tony Scaminaci (Macintosh port)
Licensed under the GNU General Public License version 2 only
NOTE: No command-line arguments have been specified
Using defaults: Test all available memory, one test pass, no logfile
Mac OS X 10.7.5 (11G63) running in multiuser mode
Memory Page Size: 4096
System has 2 Intel core(s) with SSE
Requested memory: 250MB (263086080 bytes)
Available memory: 250MB (263086080 bytes)
Allocated memory: 250MB (263086080 bytes) at local address 0x0000000101000000
Attempting memory lock... locked successfully
Partitioning memory into 2 comparison buffers...
Buffer A: 125MB (131543040 bytes) starts at local address 0x0000000101000000
Buffer B: 125MB (131543040 bytes) starts at local address 0x0000000108d73000
Running 1 test sequence... (CTRL-C to quit)
Test sequence 1 of 1:
Running tests on full 250MB region...
Stuck Address       : ok
Linear PRN          : ok
Running comparison tests using 125MB buffers...
Random Value        : ok
Compare XOR         : ok
Compare SUB         : ok
Compare MUL         : ok
Compare DIV         : ok
Compare OR          : ok
Compare AND         : ok
Sequential Increment: ok
Solid Bits          : ok
Block Sequential    : ok
Checkerboard        : ok
Bit Spread          : ok
Bit Flip            : ok
Walking Ones        : ok
Walking Zeroes      : ok
All tests passed! Execution time: 362 seconds.
logout
[Process completed]
Seems Okay I guess?

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