PC struggles to boot

[H2os]

PC specs
PSU: 1000w rosewill glacier
MB: Ga-z77x-d3h lga1155 Intel
Ram: 8gb
Graphics: Gtx 960
Cpu: Intel i5-2380 3.10ghz

My PC is struggling to boot sometimes. I'll turn it on, I'll hear it post, it just sits in the Mb splash screen. A minute later I'll hear it post again, sits on splash screen. Hitting the power button in the front immediately turns it off.
I press the power button again to turn it on. The fans fire up, it runs for a few seconds and then it shuts off. Boots itself back up, I'll hear it post, still stuck on splash screen.
Pressing the power button doesn't seem to do anything so I'll turn the power off on the Power supply.
Powering it back up it'll boot just fine. PC works normally. I'll go to boot it down. The monitor shuts off but the fans on the PC keep running until I cut the power off on the PSU.
Every once in a while when I try and boot it up the Mb beeps several times and eventually shuts off, then immediately powers back up and boots fine.

All of this started when I installed a new Power Supply a couple of days ago.

I have reseated the graphics card, checked the wires to make sure everything is plugged in all the way, and reseated the ram.

Videos of some of the boot issues: http://
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[Dmcin]

If these symptoms started when you installed a new power supply have you tried the old psu? (assuming you still have it lying around somewhere)

 

[H2os]

I have not, it's such a bear to get it in and everything hooked up, but I guess I don't have much of a choice.

 

[H2os]

After changing back to the old PSU it booted with the several beeps as shown in the second video, after it turned off it went into the stuck on splash screen and continued a single beep as if posting every 30 seconds or so.

 

[Dmcin]

If you haven't already, try clearing the CMOS on your mobo, you can do it the following ways (quickest to most time consuming):
(1) Use the clr cmos on the back of your mobo near the audio jacks / usb ports (it will be lit up the color of your mobo LED's) (your computer must be on for this method)
(2) Many motherboards have a clear cmos pin / cap arrangement on the mobo itself turn the rocker on the psu off (ground yourself) and set the pin arrangement (see your mobo manual for the location of the pins) and then set it back to normal operating mode after a few seconds
(3) Take out the cmos battey from the motherboard itself and reseat it after ~ 30(s) this is a disc battery (lithium ion for your brand mobo) there are a few guides for how to do this online (you may need to remove your gpu to reach the battery)

(*) As always ground yourself and make sure the psu is off before touching components connected to the motherboard

 

[H2os]

Reset Cmos through battery removal, so far I'm 2 for 2 on clean reboots.

Edit: on my 3rd reboot, it went into multi beep mode, rebooted multi beep, rebooted and stuck on splash screen now.

 

[H2os]

Would a dying battery cause this?

 

[Dmcin]

You could try replacing the battery, make sure you know the make and model, most are 3V lithium ion coin batteries since you got two clean boots before it started acting up again this may be the issue, this could also be a power supply problem though.

(*) Make sure that you can actually use a standard battery as a replacement, I believe nearly all modern motherboards are standardized but better safe than sorry.

 

[H2os]

I will try that tomorrow. If it doesn't work, what are the odds that both psu's are bad? I replaced the PSU because I thought I needed more wattage because some of my USB ports wouldn't work every time. (I have 2 ssd's, 3 hdds, mic, Xbox controller, 2external hdds(they have their own power sources).

 

[Dmcin]

If your original psu was within the operating limits of your system before it started displaying problems (usb ports not working) then there is the potential they both have issues. Running a psu close to its maximum output for extended periods of time can definitely reduce the lifespan. Try to boot your computer with only the drive your os is installed on, no external drives or unnecessary hdds or sdds (that don't have your os installed). If this doesn't work try the above but with only one stick of ram, remove any gpus (unless the cpu doesn't have onboard graphics) this would be the moist methodical way to rule out a power supply issue.

(*) To clarify, try your old psu with minimal components attached, ideally get a known healthy psu from somewhere and use this, slowly adding components and retesting. Your new 1000W psu should be more than capable of handling the load you've explained though.

 

[H2os]

I reinstalled the 1000w PSU, and now it won't boot. It's in a cycle of trying and turning off.

I've got everything but the hdd with the OS on it disconnected.

 

[Dmcin]

This isn't meant to sound patronizing but make sure that you have the cpu connected to the psu. If you have no ram installed the mobo should give you a memory error but should still power on, try it with 1 stick and see if you can reach the bios screen. There is a more complete guide on benching components than i can provide stickied in the motherboard section of this site that you may want to refer to.

 

[H2os]

Your good, I've got power connected to cpu, tried with 2 sticks and then 1 stick.

 

[H2os]

https://m.youtube.com/watch?v=SoRTk1M741U

That's the beep error. I can't tell if it's 1 long 3 short or 2 short.

I did notice I have and always have had my ram inserted incorrectly. The slots go 1 3 2 4. Since I built this machine years ago, I had the ram seated 2 4.

I connected the gpu and ssd with the OS. It has booted fine so far. 3 power downs, and a reboot)

Edit 2: I have everything hooked back up and it has been booting fine.

 

[H2os]

I may have found the culprit. I have a Kingston HyperX ssd its connection to the sata cable is so loose. Every time I connected it to the PC, it wouldn't boot. Same identical symptons as earlier. I disconnect it, and it boots fine. It did this twice.

 

[Dmcin]

Nice! Lucky it isn't something too serious

 

[H2os]

Thank You for your help!