Markings on the board:
FX-ISL-3 Rev 1.0
PFYVH0ACY41AAU Rev 0A
SP#908959-001
SP#908959-601...
Swell61
Member
Last Activity: 02-13-2025, 04:59 PM
Joined: 10-12-2023
Location: Cambridge
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HP 280 G2 SFF schematic and boardview
Request for HP 280 G2 SFF schematic and board view please.
Markings on the board:
FX-ISL-3 Rev 1.0
PFYVH0ACY41AAU Rev 0A
SP#908959-001
SP#908959-601... -
I found two faulty DRMOSs, removed them, and now the card powers up and displays an image (I pulled power after seeing the POST screen). I have replacements in the mail. While removing them, I also unknowingly removed one cap above each DRMOS. They go between VIN on the DRMOS and ground. Other than removing one from another DRMOS and measuring it, is there a way to tell the value of the cap that needs replacing? The application diagram in the DRMOS datasheet (FDMF3035) shows Cvin but I can't see a suggest value in the document. -
Ah that makes sense. Thanks for your suggestion. I found [url]https://repair.wiki/w/Short_on_12V_or_3.3V_rail_on_Polaris_(RX_400/500)_GPUs_Repair[/url] which suggests connecting ground of the PSU to Vcore to find a faulty DRMOS so I will probably try that and if I still can't find the bad one I will start lifting the inductors.
If I do find a faulty DRMOS and I remove it, is it safe to replace the fuses and attempt to power it on in a system (assuming there is nothing else wrong with it) or do all DRMOSs need to be present before attempting to power on?Ah that makes sense. ThanksLeave a comment:
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Sapphire Nitro+ RX580 8GB GPU 12V short
Hi
I picked up a faulty Sapphire Nitro+ RX580 8GB. It was pretty clean, expect from what looked like residue around the thermal pad between the rear of the board and backplate for helping to cool the memory, so I am guessing it had some liquid spilled on it at some point. All I was told is "the screen went black when playing a game".
The 12V external power appears to have a short. The two fuses have blown (circled in red on the image) and I am measuring low resistance (1.6 Ohms) on the output of the fuses to ground. When I inject power at the output of the fuses,... -
The PCH power (PM_1VSOC) is abnormal - it is on most of the time with drops to 0v very briefly visible on the scope. This is one of the power rails monitored by the IT9795E (the EC according to the schematic). It is enabled by the S3 signal though, which keeps dropping out, which I think is causing PM_1VSOC to be unstable. I see the SIO also monitors 7 voltages, I will check those, thank you for the pointer. I am away for the holidays so will continue the debugging in the new year. The SIO doesn't seem to have a direct connection to the RESET line, can it still cause it to toggle? Presumably through...Last edited by Swell61; 12-16-2023, 04:52 PM.Leave a comment:
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I think I do have VCORE, it's at 800mV. SLP_S3 and S5 are 3.3v but with the scope I can see very brief drops to 0V, as if the processor is being reset. This led me to check the reset lines where I found this choppy reset signal problem (it being high when the board has power but is off then when the power button is pressed to turn the board on, it drops to 0V with constant spikes to high). I am now trying to figure out why the reset line is being triggered. Something clearly seems unhappy as when the board is off, the signal is high, as expected. But when the board is turned on, it becomes er...Leave a comment:
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Thanks for your response.
By fluctuating, I mean the signal is high but on the scope I can see dips to 0v briefly. E.g. SUS_S3 is high but drops to 0v very briefly. This is doing things like turning off power controllers briefly which drops the voltage. APU PWR OK signal (the one that combines the other power ok signals) fluctuates between 800mV-1.6V which I assume is because the S3 signal keeps turning the PCH power supply that is part of the APU power signal on and off.
When the board has power but is not turned on, the reset line is high. When the power button is pressed,...Leave a comment:
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The reset line is getting triggered rapidly. Not sure what from and I don't know if it a cause or a symptom....
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Another piece of the puzzle - I hooked up an old 20MHz CRO and can see APU_PWOK is fluctuating because PCH_1V0_GD is pulsing which is caused by AVDDP_EN pulsing on NPU1. This is because GLOBE_S3- is pulsing, due to SLP_S3- pulsing. I've checked SLP_S5- and this seems to be pulsing too. By pulsing I mean they are both high most of the time but I can just make out a dip to 0V on the CRO. PSOUT (power switch) seems to be behaving properly, it is high until I press the switch and goes high again once I let go and there is no pulsing. Not sure what would be causing the two SLP signals to pulse.Leave a comment:
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On closer inspection of the board, it seems as though PM_PWRGD does not actually feed into APU_PWOK. The schematic shows a 0hm link with "* CHECK" next to it but it is not present on the board. I've found a high res picture of the same board online and it is also not present. The power for the PCH is present, I've probed the SMDs on the green PCB and it has 1.0v and 1.8v and it gets warm after being powered on for a short while.Leave a comment:
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Done some more poking with this. The power rails seem OK, VCORE is at 800mV. APU_PWOK is fluctuating though, because PM_PWRGD is fluctuating. It looks like this is the chipsets power good signal? I've closely inspected it and it looks like at some point there were 3 components that were ripped off the green PCB that the chipset is on. Is anyone able to identify them please? I am wondering if they are preventing the chipset from powering up properly. I've attached a photo and have circled the missing components. It looks like it took a good beating from someone fumbling around with the heatsink...
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Re: Gigabyte X570 Aorus Pro rev1.0 diagnostics
Sorry my bad, I thought keeping documents directly related to this would be best kept in the thread as I've seen other threads do the sameLeave a comment:
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Gigabyte X570 Aorus Pro rev1.0 diagnostics
Hello
I have a Gigabyte X570 Aorus Pro rev1.0 that doesn't work. I know the motherboard is at fault because the CPU, RAM and power supply have all been tested with a known good motherboard (including after trying them in the faulty board to check it hadn't killed them).
Thanks to some people on this website and elsewhere on the internet, I have a schematic and boardview for the WiFi version of this board, a schematic for the Elite version of this board (same board but cut down on features) and repair guides for other AM4 boards, one of which is for an Asus Tuf Gaming...Last edited by SMDFlea; 11-07-2023, 03:39 AM. -
Re: Gigabyte X570 Aorus Pro v1.0 boardview and schematic request
Perfect, thank you very muchLeave a comment:
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Gigabyte X570 Aorus Pro v1.0 boardview and schematic request
Hi
Does anyone have the boardview and schematic for a Gigabyte X570 Aorus Pro rev 1.0 please? I see there is a boardview for the WiFi version of this board on here but no schematic.
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Re: HP Pavilion 14-ce3514sa G7AL-2G DAG7ALMB8C0 REV: C diagnostics
Following the request on the other thread, I've measure the pins on PU4 (schematic) / PU8300 (boardview) / PU12 (other thread) - the RT8231BGQW for the RAM:
Pin 4 (VTTREF): 0V
Pin 7 (1P35V_S3/MAINON): 0V
Pin 8 (1P35V_S5): 0V
Pin 9 (1P35VTON): 18.9V
Pin 11 (1P35_VID): 5.1V
Pin 12 (+5VS5): 5.1V
I'm not sure where to measure VCCSA/PCHPOWER. PCH_PWROK is 0V and VCCIN_AUX (not on the schematic but is in boardview) is also 0V. RSMRST is 3.3V.Leave a comment:
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Re: HP Pavilion 14-ce3514sa G7AL-2G DAG7ALMB8C0 REV: C diagnostics
I've resoldered all of the pins on the DIMM slot. The board booted a couple of times but it had the intermittent no RAM or VCCIN voltage problem. Now it has that problem consistently and doesn't boot at all. Something isn't turning on those power railsLeave a comment:
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Re: HP Pavilion 14-ce3514sa G7AL-2G DAG7ALMB8C0 REV: C diagnostics
It's something to do with the RAM slot. I just pressed a lot of weight on it with my hand and powered it on, and I got a screen about the CMOS battery being disconnected out of the HDMI portLeave a comment:
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Re: HP Pavilion 14-ce3514sa G7AL-2G DAG7ALMB8C0 REV: C diagnostics
Update: I found some gunk (looks like a sticker) in the RAM slot on one end that looked like it was preventing proper contact with the DIMM (it could have been shorting the pins, I didn't check before I cleaned it). I've cleaned it all out and now the RAM and CPU voltages have gone when I power it on, they're both 0. I can hear coil whine when I turn it on now. It seems that my symptoms now match those from the thread I used the picture from - [url]https://www.badcaps.net/forum/showthread.php?p=1233066[/url]
...Last edited by Swell61; 10-17-2023, 02:11 PM.Leave a comment:
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