Guys I don't have much experience at all with modern motherboards so I may ask a few dumb questions here
I have this Z270 Mk 2
If I power it up with no RAM it beeps as you would expect and the RAM LED (orange) lights up constantly
If I power it up with 1 or 2 DDR 4 fitted as according to the user manual it does not beep and I get no output from the onboard graphics or a PCIe GPU (GTX 750)
I have a PCIe POST card (one of the bluetooth type) but I have almost tried it before apart from testing that it does work on a known good board.
https://www.aliexpress.com/item/3239...archweb201603_
I get no POST code with it in any PCIe slot
I have Vcore to the CPU 1.028V
I have Vram 1.24V
I have 3.33V and 1.024V on the capacitors integrated to the top of the North Bridge
all that looks good.
Known good compatible Celeron G3900 CPU and all pins in the LGA1151 socket look good under a microscope
Nothing is getting hot and no visible damage
Tested with No RAM, with pair of Corsair Vengeance LPC 2400MHz DIMMS and also with single DIMM in any slot.
The result is always the same with the diagnostic card in any PCIe slot, I get 'Did not receive the QiGuan open code of the PCIE slot'.
When I power on with RAM fitted, the orange RAM LED comes on for a few seconds and goes off. If I press the MEM TEST button and hold it down when the orange LED is on then it goes through the motions of trying different RAM settings as described in the user manual - powers off/on every 30 seconds or so and I get different 'flash codes' on the orange RAM LED but eventually it goes back to the first stage, RAM LED lights for a few seconds then goes out.
There is a little 9 pin connector (marked with red arrow in pics) and this is not mentioned in the user manual. I thought perhaps it is an LPC debug port but when I connect my diagnostic card to that (tried various orientations) the board will power on (with or without RAM) but no longer beeps without RAM
Why do I get no POST diagnostic code when the motherboard it is obviously active?
Do these sort of boards output the POST codes in some other way than to the PCIe slot?
Can these modern boards be really finicky with DDR4 RAM type? The ones I have are known good, as is the CPU and the speed of the DDR4 (2400MHz) should be compatible with this board according to google search but could that be the problem.
Pics attached
I have this Z270 Mk 2
If I power it up with no RAM it beeps as you would expect and the RAM LED (orange) lights up constantly
If I power it up with 1 or 2 DDR 4 fitted as according to the user manual it does not beep and I get no output from the onboard graphics or a PCIe GPU (GTX 750)
I have a PCIe POST card (one of the bluetooth type) but I have almost tried it before apart from testing that it does work on a known good board.
https://www.aliexpress.com/item/3239...archweb201603_
I get no POST code with it in any PCIe slot
I have Vcore to the CPU 1.028V
I have Vram 1.24V
I have 3.33V and 1.024V on the capacitors integrated to the top of the North Bridge
all that looks good.
Known good compatible Celeron G3900 CPU and all pins in the LGA1151 socket look good under a microscope
Nothing is getting hot and no visible damage
Tested with No RAM, with pair of Corsair Vengeance LPC 2400MHz DIMMS and also with single DIMM in any slot.
The result is always the same with the diagnostic card in any PCIe slot, I get 'Did not receive the QiGuan open code of the PCIE slot'.
When I power on with RAM fitted, the orange RAM LED comes on for a few seconds and goes off. If I press the MEM TEST button and hold it down when the orange LED is on then it goes through the motions of trying different RAM settings as described in the user manual - powers off/on every 30 seconds or so and I get different 'flash codes' on the orange RAM LED but eventually it goes back to the first stage, RAM LED lights for a few seconds then goes out.
There is a little 9 pin connector (marked with red arrow in pics) and this is not mentioned in the user manual. I thought perhaps it is an LPC debug port but when I connect my diagnostic card to that (tried various orientations) the board will power on (with or without RAM) but no longer beeps without RAM
Why do I get no POST diagnostic code when the motherboard it is obviously active?
Do these sort of boards output the POST codes in some other way than to the PCIe slot?
Can these modern boards be really finicky with DDR4 RAM type? The ones I have are known good, as is the CPU and the speed of the DDR4 (2400MHz) should be compatible with this board according to google search but could that be the problem.
Pics attached
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