Does RAM just die?

A bad drive can absolutely stop a POST. I'm still leaning towards your power supply. Order a decent 500-600w unit from amazon, it will be here tomorrow and if it doesn't work, then you have the first piece of your next build ;)
Ah - I thought it could be bypassed!

what the heck form factor is this one? ATX??
 
https://a.co/d/6koktOb

A lot of PC building components are cheap right now, power supply's unfortunately are not one of them. Sub $100 unit with a 10 year warranty is still pretty good.
If you just need something to get it going that's just good enough and will probably last as long as this system is still relevant this 600W thermaltake unit is on sale for $42, no-frills, no modular connections and no connectors for new video cards but for powering an existing system that just needs to last a little longer this should be fine. https://www.amazon.com/Thermaltake-Certified-Continuous-Active-PS-SPD-0600NPCWUS-W/dp/B014W3EMAO
 
My random troubleshooting thoughts:
  1. Not a GPU issue since you're still not getting any video output with just the IGP.
  2. Doubt it's RAM. Bad RAM will not let you computer POST but having two go bad at the same time is rare. I've had some sticks go bad - but very rare compared to the other PC hardware and usually due to poor quality. I haven't had one brand-name stick go bad yet. I also find that RAM tends to die gradually as well, with an increasing amount of crashes leading up to complete failure. (are those G. Skills?)
  3. Could be PSU. Most PSUs I've come across will slowly fail instead of catastrophically (assuming no surges) but since it turns on, stays on, but doesn't post leads me to the next part:
  4. I'm thinking it's the motherboard because neither RAM sticks work. If not the motherboard, then the PSU.

Unplug everything that is not essential to turn the computer on and POST - so your SB ZX and every single cable and accessories including your CPU AIO, SATA ports including the boot disk, and other plugs. You should only have your CPU, 1 RAM stick, the power connections to the mobo and CPU, and front panel power connector. See if it POSTs after that (but don't leave it on for too long since the AIO is unplugged - we just want to see if it will get to POST first.)

Would you happen to have any other spare DDR4 RAM, PSU, or Z170-compatible CPU to try out?
 
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Not sure if someone already suggested this but remove the 2032 battery for a good 10 minutes with the power supply unplugged. Hold the power button for 30 seconds or so to discharge the caps. Then put everything back and try again. Also, try removing both sticks of RAM and powering up, motherboard should beep 3 times for a memory error.
 
Not sure if someone already suggested this but remove the 2032 battery for a good 10 minutes with the power supply unplugged. Hold the power button for 30 seconds or so to discharge the caps. Then put everything back and try again. Also, try removing both sticks of RAM and powering up, motherboard should beep 3 times for a memory error.
Did all this. No beeping but for sure, no RAM in, RED LED glows

BTW I have 4 sticks of 8GB (32GB total)
 
My random troubleshooting thoughts:
  1. Not a GPU issue since you're still not getting any video output with just the IGP.
  2. Doubt it's RAM. Bad RAM will not let you computer POST but having two go bad at the same time is rare. I've had some sticks go bad - but very rare compared to the other PC hardware and usually due to poor quality. I haven't had one brand-name stick go bad yet. I also find that RAM tends to die gradually as well, with an increasing amount of crashes leading up to complete failure. (are those G. Skills?)
  3. Could be PSU. Most PSUs I've come across will slowly fail instead of catastrophically (assuming no surges) but since it turns on, stays on, but doesn't post leads me to the next part:
  4. I'm thinking it's the motherboard because neither RAM sticks work. If not the motherboard, then the PSU.

Unplug everything that is not essential to turn the computer on and POST - so your SB ZX and every single cable and accessories including your CPU AIO, SATA ports including the boot disk, and other plugs. You should only have your CPU, 1 RAM stick, the power connections to the mobo and CPU, and front panel power connector. See if it POSTs after that (but don't leave it on for too long since the AIO is unplugged - we just want to see if it will get to POST first.)

Would you happen to have any other spare DDR4 RAM, PSU, or Z170-compatible CPU to try out?
Go back through the thread. Got a couple sticks of RAM and a PSU on the way. I may try unplugging everything this afternoon or waiting until I try the new RAM and PSU tomorrow then if no help, well then MB/CPU
 
I had a bad HDMI cable not give a no signal or anything. PC would go into Windows (look to me as a no post), however my screen would be blank.
I was sure the GPU died.. but a simple cable change fixed everything. Makes sure nothing is loose as far as cables go.
Also change cables if you see chew marks :)
 
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I had a bad HDMI cable not give a no signal or anything. PC would go into Windows, however my screen would be blank.
I was sure the GPU died.. but a simple cable change fixed everything. Makes sure nothing is loose as far as cables go.
Also change cables if you see chew marks :)
Interesting.Your monitor said nothing?

My monitor says no signal when plugged in, when not plugged in it says "check HDMI cable" (don't ask me how I know this) - so I infer the cable itself is OK
 
@Pew @jayjr1105 and all others

What are your thoughts on the RED LED behavior?

Two sticks in the same slots, RED all day long

Other two sticks in the same slots, RED ONLY WHEN I PRESS THE LEETLE BUTTON BELOW THE FRONT POWER BUTTON
 
Go back through the thread. Got a couple sticks of RAM and a PSU on the way. I may try unplugging everything this afternoon or waiting until I try the new RAM and PSU tomorrow then if no help, well then MB/CPU
With everything else you've tested I wouldn't be surprised at all if its the RAM. Is all the RAM the same make/model/speed as well? While it shouldn't matter I have seen some motherboards that are extremely picky and will not boot without the RAM all being identical. Normally it should just boot and go to the slowest speed the RAM is able to use but not always. I don't think you have mentioned the manufacturer of the motherboard but you may look into this as well.

I've had to send back multiple Lenovo laptops with bad RAM for replacement under warranty. They use a tone from the speaker to tell you what the error code is if the PC will not POST properly. Similar to the LED light code you are getting. Not sure if its a bad batch of cheap RAM Lenovo has been using or what but it certainly wouldn't surprise me. Lenovo quality is very far from back when ThinkPads were made by IBM before they sold the brand off.
 
Interesting.Your monitor said nothing?

My monitor says no signal when plugged in, when not plugged in it says "check HDMI cable" (don't ask me how I know this) - so I infer the cable itself is OK
No signal was not shown... I mean it was last year... so 95% sure. Monitor goes into power saving in 5min of no signal.. and does not
wake up unless turned off and on or signal(slim chance I missed that)
It sure looked like no POST too.
Try a new cable or see if dust isnt too much in either cable or card, clean if needed...
Do both integrated and dedicated video cards both show no signal? That should also clear up if
we have a suspect...
 
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