I have read the 'first boot' guide and it really helped me on my build. I also read it several times now that my desktop stopped working. I'd like you to give me the benefit of the doubt that I've done my research. Thank you =)
Computer makes no sound at all when trying to power up.
I built it four months ago and it ran perfectly the first time but then I unplugged everything and put the case back in the box with the components inside.
On Christmas, I took it out and booted it just fine, and played to my heart's content for a month. Put the case back again in the box and left.
Spring Break, I come back missing my bastard child and it just won't wake up. =(
Won't boot at all, no sounds, no beeps, no fans turning, no earth shaking, NOTHING.
Only thing I can hear, because I was extra paranoid, is a very low chirping sound coming from the PSU when I turn it on. It sounds electrical in nature, but then again, I can't be sure it wasn't there in the beginning, since it's VERY low.
Anything else shouldn't matter since...
Things I did:
1. Came home, took out the case, plugged peripherals, plugged PSU, turned it on, pressed Power Button on case. Nothing
2. (I always power off and unplug, and the MOBO's LED is at least on, also, the Turbo Key turns on a red light)
3. Opened case, tried shorting the power button with flat screwdriver and clip. Nothing
4. Took out PSU and connected Green to Black with clip, PSU fan works.
5. Connected PSU to a fan and tried the Green/Black clip thing; both fans work.
6. Tried Breadboarding or benchtesting (Hope they're the same, LOL)
7. Connected PSU to MOBO and added a RAM stick; used case Button and Shorted; nothing.
8. Added GPU, connected to PSU, tried to power it on both ways. Nothing.
9. (Yes, the 4 pin was always in when I tried to turn it on, as well as the 24 pin thing.)
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, long single beeps, or series of short beeps indicate a problem with the memory. If you get short beeps verify that the memory is in the appropriate motherboard slots.
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.
You have a lot of great advice already, but I'll contribute my guess since you asked.
It sounds as if the power coming from the PSU is no longer accepted by the MB.
-This could be because the PSU is damaged or faulty. Other Thermaltake TR2 RX units were made by HEC, a rather crappy PSU OEM usually. Maybe this one was as well... I have no solid info and in my opinion Tt can be very shifty when it comes to models and such.
-Or it could be the MB itself should be accepting the power but is not because of failure.
A PSU that can run a fan and appear to start when jumped is not always a working PSU. A fan can run with a wide spectrum of DC power, but a CPU needs very precise power. The various rails could be tested for voltage with a multi-meter, but even that doesn't rule out more transient issues that the meter is not sensitive enough to record.
You probably need to swap in a known working PSU, then if that's not it replace the MB.
Alright, since I couldn't figure out which one wasn't working and I do not have a known working PSU, I went Best Buy (Yes, probably not the best choice) with my MB and PSU for them to test them but apparently they want me to reassemble my whole computer after I stripped it down for testing.
Do you guys have any recommendation as to where to go? Or should I bother reassembling my whole computer just so they'll eventually strip it down to the PSU and the MB xD.