I received all the parts for my computer today and as soon as i hooked it up and tried to start it nothing happened. There's a green light on my motherboard that turns on that reads "Boot_device_LED" and stays on as long as the power supply is turned on.
Also, there's a button that reads "MemOK" and when I hold that button down (while the power supply is turned on) after a few seconds, all the fans turn on, and all the lights turn on for only half a second and then everything dies just as fast once again.
I've checked and rechecked to be sure everything is plugged in but absolutely nothing is working.
Here's my specs:
PSU: Antec EA-750
Intel Core i7-870 Lynnfield 2.93GHz LGA 1156 95W Quad-Core Processor BX80605I7870
Western Digital Caviar Black WD1002FAEX 1TB 7200 RPM SATA 6.0Gb/s 3.5" HDD
Crucial 4GB 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10600) Desktop Memory
ASUS P7P55D-E LGA 1156 Intel P55 SATA 6Gb/s USB 3.0 ATX Intel Motherboard
SAPPHIRE 100283L Radeon HD 5770 (Juniper XT) 1GB 128-bit GDDR5 Support Video Card
Any help ASAP would be very helpful. Thanks
* 6 hours ago
* - 4 days left to answer.
The mobo is definately compatible, says so like everywhere I looked. Im not sure about the hard drive or the faulty RAM though...
And yes I did install everything myself, but there was no power running through the system, and I wasn't working around where there would be any static electricity.
I'll try unplugging most of it though and see what happens
5 hours ago
I took out everything but the power to the mobo, the cpu power, and the video card power, and got nothing....
Had a similar problem with a i5 760 and a Gigabyte mobo.. DO NOT INSTALL the ram in the 1st and 3rd slot. (counting from left to right).
The mem controller of the i5 and i7 ( I imagine i3 would be the same, cant remem and Iv never built a i3) is built into the CPU die, hence no NB .. It also functions diffrently to a standard NB mem controller.. From left to right (with the cpu and I.O ports to your left) count 3, 1 ,4, 2 - install your RAM in slots 1 and 2.. I think on your mobo its the blue slots where you WANT TO INSTALL the RAM.
The Pc i built also just went on, fans/lights do there thing, then it would turn itself off..
Hope this helps man,as I know what its like to have a nice new i5 system infront of you and you cant use it..
Breadboard with just motherboard, CPU & HSF, case speaker, and PSU.
Make sure you plug the CPU power cable in. The system will not boot without it.
I always breadboard a new build. It takes only a few minutes, and you know you are putting good parts in the case once you are finished.
You can turn on the PC by momentarily shorting the two pins that the case power switch goes to. You should hear a series of long, single beeps indicating memory problems. Silence indicates a problem with (in most likely order) the PSU, motherboard, or CPU. Remember, at this time, you do not have a graphics card installed so the load on your PSU will be reduced.
If no beeps: Running fans and drives and motherboard LED's do not necessarily indicate a good PSU. In the absence of a single short beep, they also do not indicate that the system is booting.
At this point, you can sort of check the PSU. Try to borrow a known good PSU of around 550 - 600 watts. That will power just about any system with a single GPU. If you cannot do that, use a DMM to measure the voltages. Measure between the colored wires and either chassis ground or the black wires. Yellow wires should be 12 volts. Red wires: +5 volts, orange wires: +3.3 volts, blue wire : -12 volts, violet wire: 5 volts always on. Tolerances are +/- 5% except for the -12 volts which is +/- 10%.
The gray wire is really important. It should go from 0 to +5 volts when you turn the PSU on with the case switch. CPU needs this signal to boot.
A way that might be easier is to use the main power plug. Working from the back of the plug where the wires come out, use a bare paperclip to short between the green wire and one of the neighboring black wires. That will do the same thing with an installed PSU. It is also an easy way to bypass a questionable case power switch.
This checks the PSU under no load conditions, so it is not completely reliable. But if it can not pass this, it is dead. Then repeat the checks with the PSU plugged into the computer to put a load on the PSU.
If the system beeps:
If it looks like the PSU is good, install a memory stick. Boot. Beep pattern should change to one long and several short beeps indicating a missing graphics card.
Silence or long single beeps indicate a problem with the memory.
Insert the video card and connect any necessary PCIe power connectors. Boot. At this point, the system should POST successfully (a single short beep). Notice that you do not need keyboard, mouse, monitor, or drives to successfully POST. At this point, if the system doesn't work, it's either the video card or an inadequate PSU. Or rarely - the motherboard's PCIe interface.
Now start connecting the rest of the devices starting with the monitor, then keyboard and mouse, then the rest of the devices, testing after each step. It's possible that you can pass the POST with a defective video card. The POST routines can only check the video interface. It cannot check the internal parts of the video card.