can pc boot without processor and/or ram?

October 24, 2010 at 07:39:31
Specs: Windows Vista
I know its stupid, but im not that. I built my first pc, and the first time i power it up it worked. 10 seconds later it shut down. i dont know if the cpu, ram, mobo or anything else is burnt.
i know that if the computer is power up without ram, it will BEEP BEEP BEEP BEEP BEEP. and thats ok with me cause i know that the ram is missing, but, after the first time i power it up, it never booted after.
please help

my computer is:

AMD Phenom II X4 945 Deneb
G.SKILL Ripjaws Series 2 x 2GB DDR3 1600 (PC3 12800)
ASUS M4A87TD
SAPPHIRE 100283-3L Radeon HD 5770 1GB 128-bit GDDR5
COOLER MASTER Silent Pro M600 RS-600-AMBA-D3 600W ATX12V V2.3
Western Digital Caviar Black WD1002FAEX 1TB 7200 RPM
Thermaltake V4 Black Edition Gaming Chassis Mid Tower


See More: can pc boot without processor and/or ram?

Report •

#1
October 24, 2010 at 08:03:49
Forget the boot sector virus thing fer gawds sake.This is a NEW build isn`t it and you didn`t even get to installing the o/s i`m assuming?
Double check you have everything plugged in and maybe even unplug and plug it back in again.You would be surprised how many times something is just not connecting because it isn`t plugged in properly, especially on new hardware that has all those tight new sockets on it.Also make sure you have installed the mobo standoffs correctly and the mobo isn`t shorting out on the case or something.Dont forget the mobo has 2 power leads that go to it.I`ve seen some people forget the little square power lead above the northbridge.
Good luck!

Report •

#2
October 24, 2010 at 08:05:22
Sorry i forgot to say, no it wont boot and also it wont do any harm so dont worry about booting it with nothin in.

Report •

#3
October 24, 2010 at 08:20:15
You should have tested the build outside the case first. Try to boot up with all drives disconnected and only one stick of RAM and see what happens.

Report •

Related Solutions

#4
October 24, 2010 at 09:20:44
joohax

I don't see where the original poster said anything about a boot sector virus.

chaud

As stated in #3 above you should always bench test the board before installing in the case. That said, if the system seemed to run for 10 seconds I would suspect overheating. Did you properly apply a thermal pad or thermal paste between the CPU and the heat sink? Also, verify the heat sink is install correctly. All the additional items mentioned in #1 are also valid.

If you didn't see anything on the screen then it probably didn't actually boot.

One other thing to mention. That graphics card requires an additional 6 pin power adapter to be connected. Did you do that? Look at the link below for requirements.

http://www2.amd.com/us/products/des...


Report •

#5
October 24, 2010 at 10:24:08
thanks for the reply
actually, i did the first boot outside the case
there's a led in the mobo thats on when it has power (on stand by and not power on). The first time i boot, the led was on, and when the pc shut down after the first boot, the led never turned on again.
the graphic card was connected properly, im sure of that, in the pci express x16 and the 6 pin power plug connected to the power suply
i verified the connections on the atx 12v and the eatx power plugs after i booted.

eh...

1 thing to mention: i booted the first time without the atx 12v 4-pin connected, could it be that i burnt the mobo or anything with what i did?


Report •

#6
October 24, 2010 at 10:33:32
answer this question, i dont want to continue been a n00b:
1. a pc without a processor can boot, or at least, can turn on? (a pc without ram can boot but will beep continuously)
2. a pc without any graphic card (integrated or independent) can boot? (i think yes, it will turn on at least and the fans will the running)
3. can i use the power supply i have on any new 2009-2010 mobo?

Report •

#7
October 24, 2010 at 11:15:25
A PC without a processor will do nothing, absolutely nothing. It will just be a collection of electronic components with electricity going through them but doing nothing. Without a CPU, nothing happens. I wont even be able to beep as it needs a working CPU to do that even.

A PC without a graphics card will boot, may even load the operating system and boot that and carry on doing whatever it is supposed to do. The problem is you wont be able to see any of it so you can't tell exactly what is happening.

The fact that fans spin an LED light mean very little except that there is some power there. You can do that with just a flash-light battery, a fan and a LED

Stuart


Report •

#8
October 24, 2010 at 11:16:53
i think i have to check every component of the pc to know what of them are failing.

Report •

#9
October 24, 2010 at 12:00:50
First verify you have power to the power supply (PSU).

You didn't respond to my questions concerning overheating. Did you use a thermal pad or paste on the CPU?

You bought a "AMD Phenom II X4 945 Deneb" Did the heat sink/ fan come with the CPU (processor) That would indicate you bought a retail CPU. Even then you may have needed to remove a protective film from the heat sink prior to installing. Also, you need to install correctly.

Try installing ONLY one stick of RAM (memory) and starting.

So, you tried booting outside the case once and it turned on for 10 seconds. Then what, did you install the board into the case at that time?

From what I can see your case is not what I would have bought. First of all the PSU is mounted at the bottom, which is a bad idea, IMO. More importantly, it appears there are stamped in bosses in the case to mount the board to. This is in place of metal screw-in stand offs. That type of case can cause the board to short out to the case. You should be using insulating washers in between the case and the board with that case.

If you have the board installed, remove it and try outside the case with only the CPU/ heat sink/fan, 1 stick of RAM, Video card, power connections from PSU to board and graphics, monitor and keyboard.

No additional connections, drives, external components, etc. If the board will not POST then you may have damaged it. If I had to guess, I would say it would only affect the motherboard itself.

Correct me if I am wrong about how the board mounts.


Report •

#10
October 24, 2010 at 14:14:27
Remove all connectors to the power supply. Remove all add in cards to the mb. Then find web page on how to use paper clip to turn on power supply. Usually you have to connect one hard drive for this test.
Borrow or buy a volt meter to test voltages. Use a digital meter not an older one with a swing type read. Test voltages.

Then connect psu back to the mb. Disconnect the hard drive. Use paperclip to jump pins. Again test voltages.

See web pages on some motherboards that don't respond quick enough to psu's. Some motherboards will not respond in time to allow psu to latch on.


NO. A computer needs cpu and ram. There is a pre-post test and a post test that needs to finish before you can get to any start up.

In that pre-post test the computer tests a very limited amount of things. One is 64 bit of ram and to do that it needs to check the cpu also. You can't get past pre-post without either installed.

In any case you can't test a cpu without a heat sink on. It will burn up in seconds or less.

Why did it take me over a year to phone in a problem to ATT?


Report •

#11
October 24, 2010 at 16:55:05
to response the last post of OtheHill:

"First verify you have power to the power supply (PSU)." how? with a multimeter?

"You bought a "AMD Phenom II X4 945 Deneb" Did the heat sink/ fan come with the CPU (processor) That would indicate you bought a retail CPU. Even then you may have needed to remove a protective film from the heat sink prior to installing. Also, you need to install correctly." protective film from the heat sink? that's not the thermal paste?

"So, you tried booting outside the case once and it turned on for 10 seconds. Then what, did you install the board into the case at that time?" no, i didnt. the first boot and all the later attempts were always outside the case.

"From what I can see your case is not what I would have bought. First of all the PSU is mounted at the bottom, which is a bad idea, IMO. More importantly, it appears there are stamped in bosses in the case to mount the board to. This is in place of metal screw-in stand offs. That type of case can cause the board to short out to the case. You should be using insulating washers in between the case and the board with that case." yes, you know you're right

"If you have the board installed, remove it and try outside the case with only the CPU/ heat sink/fan, 1 stick of RAM, Video card, power connections from PSU to board and graphics, monitor and keyboard." i did it, nothing happened, no boot, no fan running, nothing

anyway, thanks everyone for the posts. i will buy a cheap AM3 motherboard, a cheap sempron, a thermal paste and a cheap ddr3 1066 ram stick to check what componet in my pc is working.

I know im a ULTRA ÜBER N00B, but, i think this way i can learn more, and stop being a n00b.

thanks all
-Chaud


Report •

#12
October 24, 2010 at 19:30:27
I meant you should make sure the AC power was getting to the PSU. Also verify the power switch on the PSU is on, if so equipped.

The thermal tape usually comes applied to the heat sink but will have a protective film (plastic) on it. The protective film must be removed.


Report •

Ask Question