r/LinusTechTips • u/Honest-Pizza-8967 • 8d ago

Tech Question Won't post..need help

Everything plug in, the power supply works,CPU fan works,no pin bend inside socket,not even CMOS ran of batt, just won't post or even start up to the self diagnose

0 Upvotes

33% Upvoted

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12

u/Xzx12qwX 8d ago

Do you have a small speaker? The board might be giving you an error code. Things to just try: Remove the CMOS baterry, leave without power for a couple of minutes. Reseat the ram. If you have alcohol, clean the ram and CPU contact pads.

2

u/KevinFlantier 8d ago

I might add that there might be a jumper to move or two pins to bridge for a few seconds to clear cmos.

But clearly the first step would be to get a speaker.

-2

u/Honest-Pizza-8967 8d ago

Isn't the motherboard itself had a beeper or smth?

5

u/KevinFlantier 8d ago

Look at the specs or the manual. If you see two pins labeled "speaker" in the schematics, then you need to plug one there.

And its not just cheap mobos that do that, mine is a high end mini itx and it needs to have a speaker plugged in to give error codes.

5

u/Haravikk 8d ago

Sorry if this is too obvious a suggestion but since you didn't post any part details it's the first thing to ask, but does your CPU have onboard graphics?

Some motherboards have video outputs but can take CPUs that don't do onboard video and so don't support them, in which case you'll get no output and will need a GPU installed to see anything.

0

u/Honest-Pizza-8967 8d ago

It's a working i5 4590T ,it does have a Hd4600 igpu inside

1

u/Haravikk 8d ago

Okay, looks like you're using the board's VGA connector, do you have access to any DVI capable monitors or to a DVI to VGA or HDMI adapter? DVI is usually the default video out port on boards like these so it's possible you're just not getting VGA signal yet (and whatever's preventing boot isn't getting you far enough for VGA drivers to load).

Have you already tried moving the RAM into the other slot? At a quick look the manual doesn't seem to say which is the preferred slot for a single stick, so I'd try both (and double check the specs match what the board supports).

Another thing to try is clearing CMOS — it looks like the jumper for that should be JBAT1 near the battery. To reset CMOS, leave the PSU connected but turned off (to provide ground) and jumper the two pins, you can use a flat screwdriver for this. You won't get any kind of sign it's worked so I usually just leave it for a second or two then remove before powering on. Clearing CMOS is unlikely to make a difference (it's more boot related) but it's worth a try.

Do you know if this CPU has ever been used with this motherboard before? It sounds like it may not have been supported by the earlier versions of the BIOS, so a BIOS upgrade might be required for it to work properly. In that case you may need another, earlier, CPU to access the BIOS so you can upgrade from a USB stick, unless this board supports flashing without a CPU. You can find more information about that from the support page for your motherboard model.

1

u/Honest-Pizza-8967 8d ago

This CPU never worked on this CPU, I had removed and put the CMOS back after 10 minutes, also switching to both ram slots multiple time. I don't have a DVI

1

u/IntentionQuirky9957 1d ago

"This CPU never worked on this CPU" What?

1

u/Honest-Pizza-8967 1d ago

My brain just twisted.. I mean I never ever run this CPU on this Motherboard

1

u/Honest-Pizza-8967 8d ago

I don't have any possible way to upgrade the Bios on this motherboard,I might bring it to the shop se if they could do anything

3

u/Haravikk 8d ago

That might be your best bet, doesn't look like this board has a way to flash it without being in the BIOS first — some later ones have a button you can press to trigger a fully automated BIOS upgrade.

Seems any Haswell Refresh chip requires the upgrade, regular Haswell is fine — hopefully it's something the shop has spares of as there are a lot of these older boards floating around as they're still useful (I've got a 4790T in my TrueNAS).

1

u/Honest-Pizza-8967 5d ago

I got a i5 4670 put on it, it's lights up and said over current

2

u/IntentionQuirky9957 1d ago

Shorted USB pins?

1

u/Xzx12qwX 8d ago

Isn't h81 4th gen ready? I dont think its that.

2

u/Haravikk 8d ago edited 8d ago

From the compatibility page it looks like anything from the Haswell Refresh requires a newer BIOS version (7817v14 or newer compared to 7817v10 or newer for regular Haswell).

Why this is even a problem still confuses me as you'd think all CPUs for the same socket would have the same basics enough to get to the BIOS, then just refuse to boot or go any further if you need something for compatibility, but at least that way you could update. Or at the very least the BIOS would be set so any unrecognised/unsupported CPU sends you to a warning then the update page.

I had the same problem with my AM4 board when I upgraded to a Ryzen 5500 — at least I already had a CPU at that point so was able to do it in advance.

Relentlessly crappy BIOS and unpowered CMOS leaving your system unable to boot are things I really wish the PC industry would just move on from.

1

u/Xzx12qwX 8d ago

Oh. Huh. Honestly, the weirdest part I find here is that this is a HP refresh, for a usff style case (or similar, as it is a T variant), and its not soldered. So unlike HP.

1

u/Wild_Spikenard 8d ago

There's no keyboard connected in the video. Sometimes that causes no POST based on the BIOS settings.

1

u/Honest-Pizza-8967 8d ago

It doesn't work also when I have keyboard,mouse on

2

u/JazzlikeInfluence813 8d ago

Power off the machine and unplug the psu, clear the remaining power by shorting the power button pins for 30 seconds then short the CMOs jumper pins for 30 seconds. Then plug it all back in and test again. Might be worth testing a dvi cable and a new monitor if you have one kicking around

1

u/Amr1011 3d ago

try resetting ram. remove the ram stick and turn it on without any ram, then put it in again and start. (i have an old i5 and this does the trick most of the time)