Question Asus motherboard NO Post screen but power and beep present?

[taisingera]

OK, I have had this problem for about 2 months now, and the biggest pain is that it is totally random. I press the power button on the case, the LEDs light, and there is the one beep as normal, but I get no display on the screen and no Post screen. I am getting signal to the monitor because the monitor led lights white and the blue NO signal screen turns black. I have tried reseating almost everything in the system, SATA cables, drive power, 24 pin and 4-pin cpu (SFX PSU only has 4 pins), and ram. I have tried booting with only the SSD attached and only the 3.5" hard drive attached and still have seen the behavior. System is Haswell i3, so mobo is almost 7 years old, and the power supply is 10 years old. I know PSU problems present in a number of ways, from no power at all to random crashes and random behavior. I don't have another PSU to try, and I wish the case could take ATX psu as the price and availability of SFX is not good right now.

Once the system is booted into Win10, there is no problem, but it may take up to three on/off cycles to get it to boot.

Do you think I have a power supply issue or a motherboard issue?

 

[VirtualLarry]

Can you borrow another ATX PSU? Doesn't have to be SFX, as long as all of the appropriate cables reach. Just to do some testing. I mean, hiven your stated age of the components, it could be either the mobo or the PSU, but chances are sine the PSU is older, I would suspect that first.

 

[Iron Woode]

Can you borrow another ATX PSU? Doesn't have to be SFX, as long as all of the appropriate cables reach. Just to do some testing. I mean, hiven your stated age of the components, it could be either the mobo or the PSU, but chances are sine the PSU is older, I would suspect that first.

This is why I always have a spare PSU for diagnostic purposes.

 

[UsandThem]

If you don't have a spare PSU available to find out, you can always get a PSU tester to see if your PSU is within specs:

https://www.amazon.com/Thermaltake-Automated-Supply-Oversized-Supplies/dp/B005F778JO

 

[aigomorla]

If you don't have a spare PSU available to find out, you can always get a PSU tester to see if your PSU is within specs:

they are only good for checking if the psu will spin and start up.
90% of the problems which most testers can not do is put any load on it, and that's when the box of pandora opens up on a failed psu.

OP:
If i recall ASUS had that problem on some of their older boards.
The system would not post, and would require you to shut PSU off from the rear, discharge, and then plug it back in.
But also seeing how its a SFX PSU, and seeing how i never had a SFX PSU last me more then 4 yrs, i would also be thinking of trying to get a new one, or at the very least a test psu.

It does not need to be expensive of fancy, and a spare PSU is always something good to have.
IMO you can probably get away with something like this as a test psu:

Are you a human?

www.newegg.com

At best just to see if you can post reliably, and load into windows, maybe even light stress testing on either CPU or GPU.
Keep the PSU outside the case while you do the test, and if its indeed your psu, it maybe able to hold you off a few days while you source your SFX replacement.

 

[taisingera]

I am seeing a FSP SFX pro 350w 80 plus bronze (fsp350-sac) on newegg for $67 shipped. Looks good for what I need as I doubt I will add a video card, and it should handle a Ryzen APU if it is the motherboard that is starting to die. I could pay $10 more and go for the 450w model, the only difference is the total wattage and the 12V rail 37A vs 29 a for the smaller one.

 

[taisingera]

I bought the FSP 350-50SAC and installed it. I had a hell of a time getting any video to show up on the screen, but eventually it worked. I got into windows but left the iGPU VID set to auto (usually set it to 0.9V) and sure thing just like 2013, playing a game and a local video, display crashed, with a spike in GPU activity, spike in wattage on igpu and voltage. It seems Asus really messed something up on this board with iGPU settings.

So, with the new PSU, I am still getting the no boot, no display problem. I tried pulling the RAM and I did get the beep code for no RAM. I got into Windows, restarted to BIOS to change an igpu setting about going to low power (problem up above), then restarted and no video, no post screen or any error codes. I am starting to think the integrated video on the cpu or the circuitry on mobo for the graphics is going bad. The only other thing I might try is get a cheap used video card to see if it is the video going south or the motherboard.

 

[curryloti]

Deep clear CMOS settings by pulling out the battery for 15 mins or more.

Reflash the BIOS if still not working properly.

 

[taisingera]

I reflashed the bios and loaded defaults, and still am getting this problem. I even tried booting with no ethernet cable, mouse, keyboard or any drives attached, and still I get no splash screen, but I do get signal coming to the monitor, just a black screen though. I thought it was a shut down problem as it always reboots when restarted through windows or the bios, but I did shut it down, and it booted normally. I am testing my RAM again, but a couple of weeks ago I tested it and test 1-10 of Memtest86 came back error free but I had 3 errors in Test 13 (rowhammer). Isn't all DDR3 affected by rowhammer attacks anyway?

I wonder if the motherboard or cpu graphics is failing.

 

[taisingera]

Just finished Memtest86, 4 errors on test 13 and I exited the program and the system rebooted and no post screen or video output.

 

[ArisVer]

Try memtest with a single stick each time (you have a pair, right?).

If one turns okay, try your system a few days with it to see if the problem persists. And better make two passes of each test (even four is better).

 

[taisingera]

OK, I tested one ram stick and got it to boot into Memtest86 and I got 1 Test13 error. Then I shut down, put the other stick into the same slot, and the damn system didn't boot. I tried the ram stick in two other slots and it still didn't boot, but the bios splash screen came up, but it just froze. I guess that is what the system does when I don't see anything on the screen, freezes on bios screen. I even put the old PSU in and got the same thing. I don't think the PSU was ever the problem.

At this point I think it is the RAM, but I put back the first stick into slot 1 and it didn't boot. (All of this is done with no drives connected either.) So at this point, I put the new PSU back and put both sticks of ram back in, and after a couple of tries, it boots into Memtest86. I then proceed to boot into a USB Linux install and it works, but after that I tried to boot into a Windows10 flash drive and the system didn't boot.

It looks like I can get 1-2 good boots per 10 tries. It feels like a dying motherboard, maybe cpu?

 

[ArisVer]

Are you using the correct slots of your motherboard? Read the manual. Tell us what motherboard you have.

 

[taisingera]

I got the HD8670 or R7 250 oem from ebay, and I am getting the same behavior with booting up, getting the one bios beep and then black screen and no bootup. I hit the power button once and the system shuts off. I got this after saving bios settings on first boot, and when windows installation was done and it had to reboot the system. Also getting it when shutting windows down and trying to boot back up. If it boots and gets to windows, everything seems fine.

BTW, the Asus H87M-E manual doesn't indicate anything about which slots should be used. I am using slot 1 (closest to cpu) and 3 for dual channel.

 

[Shmee]

If you are getting errors in memtest, then you have bad memory almost certainly. Seems from testing like 1 stick is completely bad (won't boot) and the other is showing errors.

 

[Meghan54]

BTW, the Asus H87M-E manual doesn't indicate anything about which slots should be used. I am using slot 1 (closest to cpu) and 3 for dual channel.

You are correct the manual doesn't state anything. But the Quick Start Guide certainly does, via pictograph. In the multi-language Quick Start guide, Step 3, page 6, it demonstrates the first DIMM slot to be used is DIMM_A2, then DIMM_B2, then the other slots (A1, B1--the two you are currently using.)

Frankly, with almost every 4 slot dual channel mem. setup I've ever used, A2 and B2 are always the first two slots to be used.

 

[taisingera]

I have moved the ram to A2 and B2 ( the yellow slots) but I still getting plagued by the same problems of it not booting on most startups.

 

[taisingera]

I am still trying to figure out what is wrong with this. I am now occasionally seeing the post screen but I see that it freezes, and doesn't boot or post. I always get the one normal beep, but it just seems to freeze now. I just did a memtest86 of each ram stick separately and they both passed without errors.

 

[nerp]

Starting to think it really is the motherboard after all.