I'd start by looking at the psu power line voltages, and try starting the supply by directly connecting the 2 relevant wires. Case button not firing up the psu would be one thing to eliminate/confirm. Another thing one can usually do is mix various new parts with old pc parts to narrow down what does & doesn't function.
Actually, most things have been tested except the case wiring. Early on I jumpered the power switch pins on the front panel header. That produced no results.
Anyway, one of AirTasker's engineers has agreed to come over this evening.
If no results means that nothing changed, that means the PSU doesnt like the motherboard or the connection to it and is failing to start for that reason.
You don't need a miracle, just work out why it doesnt start.
Bet it is just the connection of the PSU to the motherboard.
Shouldn't need that to start. More likely the PSU does attempt to power up but doesn't like what it sees on the output lines load wise. Normally that should see a bit of a flick on the mb leds but may not depending on how the PSU does things.
It should start without a graphics card. Cant remember if he has said that he has tried it without a graphics card.
Could also be something as basic as the MB mounting, a short to the case due to one of the mounting screws. The test for that is to try running the MB loose on the desktop.
probably the connection with thePSU. I used to connect things together, and then had a thought, would it be possible that the motherboard makers were testing them and selling the ones that failed to the home assemblers?
If the blue LED on the mouse illuminated, we know the PSU is good, at least as far as 5V USB power (either main 5V or 5V_standby)
Things that might cause it to seem dead:
24 way ATX power connector not plugged in
Additional 8-way connector from the PSU to the motherboard is not plugged in
CPU missing or not correctly inserted
RAM missing or not correctly inserted
Reset button miswired and holding it in reset (you don't need to plug in the reset button)
Latching power button used where motherboard expects momentary button (unlikely in a modern case, only in an ancient one or a homebrew job)
CPU incompatible with motherboard
RAM incompatible with motherboard/CPU
BIOS needs an update for current CPU
Lack of GPU on CPUs which don't have integrated graphics
Lack of GPU additional power if such is needed
Plugged into a motherboard video port on a CPU without integrated graphics
Monitor not happy with display output and showing 'no signal' all the time
Motherboard failing to detect monitor and enable output
Bad video dongle (HDMI to VGA etc)
Using a passive video dongle where active is needed (eg DP to HDMI on a machine not supporting DP+, or DVI to VGA on a machine with only digital DVI-D)
A POST code reader as previously mentioned is a good way to debug lack of booting, at least up to #11
It's a nine hole motherboard on a nine standoff mount. So there should not be an occasion for shorts on the bottom of it. The rings the mount points touch, are intended to be grounded. They're plated rings at ground potential.
And the rest of it is pretty short-resistant.
The PSU itself, shuts off the overcurrent protection for the first 35 milliseconds or so. This gives time for the supply to charge up the output rail capacitors, then the current limiter is switched back on. This is why the fans twitch on an overload -- the fan was getting power for
35 milliseconds.
To assert PS_ON#, takes PWR and COM momentary contact at the front panel, this goes through a logic block that "latches on" and drives the open-collector PS_ON# to ground. The +5VSB rail must be working on the PC (when switched on at the back), in order for the motherboard to sense the front panel switch, and assert PS_ON# in response. Then the fan on the PSU would spin (for a regular supply design).
You can bypass the PWR and COM from the front panel, make them irrelevant, by grounding PS_ON# on the 24 pin connector directly. That will definitely start the system. But if you do it that way, that eliminated your THERMTRIP protection. (If the CPU overheats, it can't stop the system.) Villains who no longer care whether the little fucker works, will try that :-) If you can't get it to work, and help is hundreds of miles away, that's an option.
Since the GeekSquad guy is coming ("AirTasker"), there's no need to panic right now. He'll figure this out.
Since the parts have been tested, it's just some connector which is not fully seated, and the latch fingers engaged. The parts have not been tested as an assembly, but they've been individually tested for function, by local humans. That's why it's just some finger problem. The chances of a functional failure now, are getting slimmer and slimmer.
At one time, motherboards had no ATX12V 2x2 connector. Then the P4 era, brought the 2x2 aux input. More recent processor generations, have seen the power input balloon to a 2x4, then a 2x4 plus a 2x2, or a 2x4 plus a 2x4. In some of those cases of alternate configurations, the location of where an ordinary
2x2 would be placed, is a bit off. And the documentation might not be correct. Mine has a single 2x4, good for 288 watts, and the machine (wall consumption) stops at around 224 watts. The 2x4 is enough. Mine has the 2x4 from the PSU (the two halves) plugged into the 2x4, but it's a bit of a knuckle buster getting it seated. (This is why you worry about the latch mating, it's the tight spacing.)
Some of these have already been ruled out. Build planning started 10/27/2023 in alt.os.linux.mint .
Model C T Boost Clock Base Clock Thermal Solution (PIB) Graphics Cores TDP L2 L3 Ryzen 9 7950X3D 16 32 Up to 5.7GHz 4.2GHz Not Included 2 120W 16MB 128MB Ryzen 9 7900X3D 12 24 Up to 5.6GHz 4.4GHz Not included 2 120W 12MB 128MB Ryzen 7 7800X3D 8 16 Up to 5.0GHz 4.2GHz Not included 2 120W 8MB 96MB
Ryzen 9 7950X 16 32 Up to 5.7GHz 4.5GHz Not included 2 170W 16MB 64MB Ryzen 9 7900X 12 24 Up to 5.6GHz 4.7GHz Not included 2 170W 12MB 64MB Ryzen 9 7900 12 24 Up to 5.4GHz 3.7GHz AMD Wraith Prism 2 65W 12MB 64MB Ryzen 7 7700X 8 16 Up to 5.4GHz 4.5GHz Not included 2 105W 8MB 32MB Ryzen 7 7700 8 16 Up to 5.3GHz 3.8GHz AMD Wraith Prism 2 65W 8MB 32MB Ryzen 5 7600X 6 12 Up to 5.3GHz 4.7GHz Not included 2 105W 6MB 32MB Ryzen 5 7600 6 12 Up to 5.1GHz 3.8GHz AMD Wraith Stealth 2 65W 6MB 32MB
Ryzen 5 7500F 6 12 Up to 5.0GHz 3.7GHz AMD Wraith Stealth --- 65W 6MB 32MB
(These are AM4 thrown in for comparison.) Ryzen 7 5700G 8 16 Up to 4.6GHz 3.8GHz Wraith Stealth 8 65W 4MB 16MB Ryzen 5 5600G 6 12 Up to 4.4GHz 3.9GHz Wraith Stealth 7 65W 3MB 16MB
All of the useful AM5 have 2 core GPUs (I didn't know this at the time, that's why I looked them up). The OP has a 7700 series one. The motherboard initial BIOS release, is compatible with all the AM5 in the table.
Normally, the lever would be seated on the CPU, since the CPU heatsink would bump against it otherwise. You would have to be sneaky, to only partially close it and clear contact with the heatsink.
AM5 is LGA as far as I know. The people who tested the motherboard, would eyeball the springs for damage. (Sometimes a villain manages to crush the springs.)
"The AM4 socket has a PGA (Pin Grid Array) type, meaning the pins are on the CPU rather than the socket. On the other hand, the AM5 socket has an LGA (Land Grid Array) type, which means that the pins are on the socket rather than the CPU. The LGA type is more durable as it is less prone to damage."
I disagree with the last sentence. Villains have pulled the heatsink up on AM4 and pulled the CPU right out of the closed PGA (ZIF) socket, without damage. Whereas villains did serious damage to LGA springs by dropping something heavy into the unprotected socket area. Back when there was a Lopes versus Foxconn issue, the springs in that case, weren't making good contact on one quadrant of the LGA pattern. Only one particular LGA design, has had that sort of issue.
You can tell LGA is working, because each LGA contact has a "bite mark" from the spring. It takes a bit of magnification to see that. The mark from the spring should be dead center on each pad.
The boards no longer have PCI slots, so "easy" POST card usage is not possible. There is a POST card for LPC bus. These are not likely to be stock items at the computer store. Only the motherboards with the two seven segment displays right on the motherboard, have POST output any more. Typical user manuals don't even have a POST code table. Not a good situation.
But since the PSU fan won't spin at the moment, that means a number of items in your table, don't have a chance to be issues quite yet. I've had trouble with your (13), so that's still something to check. But that will come later.
I'm hoping this is a non-destructive finger problem. the successful test of the components, hints at the non-destructive part.
Where are you getting the motherboard model from ?
Depends on what is used as the standoffs.
It turned out to be more complicated than that with one of Asus mbs.
Sure.
It turned out to be more complicated than that with one of Asus mbs which did have a mb short to case.
It never started the psu at all apart from the standy 5V supply.
It turned out to be more complicated than that with one of Asus mbs which did have a mb short to case.
It never started the psu at all apart from the standy 5V supply.
No news. We don't know which of the psus he has treid.
You don't need any help if you know what your are doing.
It can be if its a short to case.
Yep.
No news. But you would normally see some sign of life if that was the problem. Not clear if there is no sign of life tho, he isnt very specific about that.
Not very likely and there should still be some sign of life.
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