Re: MB won't even attempt POST
Basically, I removed and replaced the battery (which does clear the CMOS - as it keeps it 'alive' when power is off). Once battery replaced, I've not had a single problem since. I did have the initial boot show a CMOS 'failure' message - but that's expected after clearing CMOS. Since then the board's been fine. I'm happy!
freeportd
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Last Activity: 03-03-2019, 02:24 PM
Joined: 07-07-2006
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Re: MB won't even attempt POST
In the hopes that it might help someone else, I resolved this by removing the CMOS battery and replacing. Not sure why that helped, but it did. Consistent powerup is gratifying!
freeportLeave a comment:
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Re: MB won't even attempt POST
It's a brand new unit. Also tried with a different known-good PS and same results. The known-good PS was recapped by yours truly - and later confirmed working in another working system. So, unlikely that (two) PS are bad.
I've replaced all caps of 1000 uF or greater. See my prior post - pin 14 is showing 4.05v - seems wrong to me if I'm hoping to see the PSU spin up......Leave a comment:
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Re: MB won't even attempt POST - more info
Well, I've done more multi-meter work - here's the info:
When PSU rocker switch is on (1), the voltages observed by pin number are:
1) .01 2) .01 3) n/a 4) .97 5) n/a 6) .97 7) n/a 8) .03 9) 5.11 10) .04
11) .01 12) .00 13) n/a 14) 4.05 15-17) n/a 18) .00 19) .97 20) .97
I also checked pin 8 (PwrOK) while PS rocker=1 and power button pressed - no change in voltage (stays at .03).
I then checked pin 14 (ps-on) while pressing power button - it stays at 4.05....Leave a comment:
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Re: MB won't even attempt POST
Well, I just verified that the switch (power on) is OK.
So, what's going on with this MB? It's OK once it's booted once...and then I don't remove power to it...but once I do....
freeportdLeave a comment:
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Re: MB won't even attempt POST
Well, not there yet...I powered down by holding the power button for 4-5 seconds, repeated a few times and all looked good. My wife then reminded me that once the computer booted, it was fine until she turned off the power strip to the PS at the end of the day. So, I turned off the toggle on the back of the PS, waited a few seconds, turned it back on....and now it's back to the same state...no power on.
Also, when it did work as just reported in previous post, the first press of the power button didn't do it...a second push then launched...Leave a comment:
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Re: MB won't even attempt POST
Wow, you guys are fast. I checked with another (known) good PSU and similar situation. But, my VOM yields the following:
Pins 1 through 20 on the ATX connector (on the MB) look relatively OK per other posts. By that, I show all ground connections with zero resistance to each other. The pins with power all show some sort of (increasing) resistance as I connect one lead to ground and the other to the respective pin. I'm assuming that's a cap as it's charging - thus increasing resistance to circuit between probes.
However,...Leave a comment:
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MB won't even attempt POST
Hi there,
I recently recapped my Epox 8rda+ motherboard, put things back together - and things have been working fine (except issue with C1 POST error - which a reseat of RAM resolved).
After about two weeks of a happy family, the PC now refuses to power up. The fans just twitch - and then don't move. MB doesn't even attempt a POST - so no codes in my LED.
I've read a few of the other postings about checking switch, verifying voltage and such (and I'll do those steps), but what would cause this to fail all of a sudden....Leave a comment:
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MB won't even attempt POST
Well, I sweated a bunch - and got concerned about cold joints - but prior practice was valuable getting through this. The caps around the memory was tough to remove. The stainless steel pick idea on clearing holes was very valuable.
At first, I thought it was bad as I received C1 on second boot (first one was OK). But it turned out to be RAM that wasn't seated properly. This board is great!
I did it!
freeportd
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