[HOWTO] Fix/Repair "Chassis Intruded Fatal Error System Halted" on Asus P5QL

[loli_roller]

Re: [HOWTO] Fix/Repair "Chassis Intruded Fatal Error System Halted" on Asus P5QL

Ok that's a good pic. With the board powered ON, measure voltage at the CHASSIS jumper. Find the pin that has somewhere between 1 volt and 3.3v. Could be anything in that range.

Once you found it, turn all power OFF and unplug the power supply, and set your multimeter to beeper. One probe goes to that pin you found with the voltage on it, and with the other probe measure on the little 3-pin transistors around the Winbond chip. You should find one that beeps on the single pin at the top, which would be the collector or drain.

Return with these results and i will try to help you further.

Hi Th3_uN1Qu3, First of all thanks for posting this solution and keeping this thread alive. I have Asus m5a78l-m lx v2, i dont see any 3 pin transistors near the Super I/O Chip but there is another small chip below the super I/O chip that has those transistors.

[mockingbird]

Re: [HOWTO] Fix/Repair "Chassis Intruded Fatal Error System Halted" on Asus P5QL

There is a dual diode which feeds power to CMOS memory from two places: 5VSB rail of PSU via 3.3V regulator, and the coin cell. You should trace the circuit going from the coin cell holder until you get to that diode. Either the diode is bad or a leaking battery corroded the trace so the battery simply does not get connected to the circuit.

It's been some time, finally making some progress with old projects here...

I found the diode, it tests fine. It comes after a resistor marked 01B (1Kohm) which tests fine. There is a 0.2V forward voltage on both pins.

I think this has more to do with a quirk on some Asus motherboards than it has to do with a defective battery circuit. I only have this problem on my P5PE-VM with a certain CPU installed, and I do have an unsupported CPU (Xeon hack) running in this one, so I might just try it with my Q9650 instead.

My question is: What exactly keeps the SPI alive during a no power state when there is no voltage showing on any of the SPI pins... I tested this on a different motherboard, I installed a battery, and I do not see 3V on the VCC pin of the SPI chip. Unless of course there's supposed to always be 3V on VCC, but I don't remember this other motherboard exhibiting this same issue (Asus P5B).

Thanks

[Mister_Natural]

Re: [HOWTO] Fix/Repair "Chassis Intruded Fatal Error System Halted" on Asus P5QL

Thanks to this thread and contributors, I finally managed to boot that old Asus at5nm10-i (Atom inside). The chassis-intruded sot-23 diode on this model can be found up to the second 'c' of the label 'clrtc' near an angle of the mobo, if somebody else got one if those relics and need a fast-11-years-repair.

[RJARRRPCGP]

Re: [HOWTO] Fix/Repair "Chassis Intruded Fatal Error System Halted" on Asus P5QL

I think this has more to do with a quirk on some Asus motherboards than it has to do with a defective battery circuit. I only have this problem on my P5PE-VM with a certain CPU installed, and I do have an unsupported CPU (Xeon hack) running in this one, so I might just try it with my Q9650 instead.

Reminds me of my Asus socket 1366 motherboard, using a Radeon RX580, causes to CMOS to get reset, a bad bug!

If this is to do with video card chronology, looks like for Nvidia, would possibly mean you can't install a later video card than a GeForce GTX 980 series on an Asus pre-UEFI motherboard and possibly a Radeon R9 290X for AMD video cards. (suspect it's the VBIOS)

[selekop]

Re: [HOWTO] Fix/Repair "Chassis Intruded Fatal Error System Halted" on Asus P5QL

This is what mk I don't understand.

[AvenocturnO]

Just finished fixing this one. Apparently, this is a common issue with all Asus P5 series boards. I first assumed it's a bad BIOS flash or corrupt CMOS settings, as it would go away once after resetting CMOS, but upon the next reboot it would be there again. Same if i changed any BIOS settings and saved them.

I read that people have flashed BIOSes to no luck, and someone pointed towards a transistor on another (older) board, so i proceeded to look for a hardware issue. And i found it. See attachments for fix.

Instructions:

1. Follow directions in pictures
2. Clear CMOS
3. Power board up, redo all BIOS settings
4. Be happy and have a cold one.

This should apply to *all* boards that exhibit this behavior, obviously the parts may be in a different location. Follow these directions to find it if your board differs:

1. Remove jumper cap from chassis intrusion connector (if you're reading this, you already found it's of no use anyway).
2. With the board powered ON, measure with your voltmeter and find the pin of the chassis intrusion switch connector that has somewhere between 1.7v and 3.3v on it.
3. Disconnect board from PSU.
4. Use continuity tester function of your DMM and probe on the SOT23 transistors next to the super IO controller, you should find it beeps on one of them.
5. Power the board back ON and find a 3.3v supply nearby
6. Power board OFF, remove transistor, solder drain connection (it's gonna be the single pad, just like it looks in the picture) to 3.3v supply.

The rest is the same as above.

I'm also going to tell you what causes the issue to appear in the first place in a follow-up post.

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Thx a lot, working here in an ASUS M5A78L-M/USB3 followin' your guide. These are the points to jumper in my mobo;



About the "New CPU installed..." issue, I've experienced it in another machine in which a Phenom II 1100T is installed. The previous owner of the processor has blown up a couple of pins (which I'll fix when I have the time), one of those missing pins causes that bios post in my case, beyond that doesn't harm in anything and the machine boots just fine after a couple of seconds. Perhaps in other several cases the same situation could be caused by dust or other debris shorting down the socket, & why not exceeded thermal paste all over the place (I've seen very forgetable scenes...., u surely know 🤣🙈) . Obviously could be caused by bended sockets too, as been said several post above, but a deep clean of the socket could fix the issue in some cases.