HP Spectre One 23-e000 AIO Desktop PC will not turn on.

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StiPet

StiPet

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Jul 7, 2014
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State: When ac adapter is connected to the motherboard, the power LED lights up.
Power LED turns on – when on/off is pushed.

No light on screen at all, no sound from built in speaker, but notable sound from backside. It’s not the fan (it rotates), but below – in the SATA bay area. I don’t now if this sound was present earlier, I did not listen closely then.

Actions taken: Have tried to:
- remove harddisk, no change in light nor sound,
- remove RAM chips totally, POST beep codes heard but no light,
– could indicate that BIOS is working, but maybe not completely?
- remove HDD, no change in light nor sound,
- detach the USB soft circuit board connector marked ”RIGHT BOARD”, no light and no sound.

History: Got this problem after trying to change to a brand new SSHD Seagate ST1000LM014
Reason: HDD(old drive) tested, with Windows 10 CLI chkdsk and Linux Bitdefender, indicating h/w error on disc. It worked, but I could not transfere system to the new disk.

The HDD(old drive) was working all right until then, but had frequent ”hang ups”, slow operations.
- Inserted SSHD into internal SATA cable.
- Installed a fresh Windows 10, everything worked OK on the new SSHD drive.

Error: In order to compare the two installations, I tried to boot from the original HDD on external USB dock station.
This PC is different to stationary PC:s as it has a BIOS Bluetooth solution to connect the keyboard.
To get into BIOS settings, I had to use the Esc button, on Bluetooth keyboard, at boot.
- Attached the original HDD to an external USB 3 SATA dock station, ICY BOX IB-111StU3-Wh.

Result: ===> it did not boot at all, (Esc + F9 + selected External USB station)
- - after switching HDD back to internal SATA cable, the PC showed - no light and no sound !
- - just that weak sound from behind.

That leaves me with a ”bricked” AIO PC.

Any help – is really welcome.

Reguards
 
Solution
K
If you have an older PC with windows 10 installed to it, then you have a bios. If you have a newer PC that has UEFI, then the BIOS is deprecated by UEFI. You can turn off the secure boot feature once you are able to boot to an OS. You can also enable a legacy BIOS compatibility mode, but again, you must first successfully boot an operating system to get to the UEFI options screen. If UEFI is preventing you from booting, you should see an "Invalid Signature Detected" error message on the screen. UEFI will not leave the screen blank.

That sound that you hear is probably caused by high frequency and/or high voltage current crackling through a failed component. The screen is probably blank because something is physically wrong with the...
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StiPet

StiPet

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Jul 7, 2014
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(Answering myself) The problem was, how to reset BIOS without any light on the screen.
At the HP website I had found issues on blank screen, mine was black.
- so I left them untested then, but returned this morning to
”Computer starts but Monitor/Screen remains blank”
In step 3, there is a sequence (used wired USB keyboard) at boot:
- press F10 repetedly for 8 sec,
- press Arrow Down 3 times
- press Enter 2 times

and BANG - ”Fiat lux” normal boot. Unable to save BIOS settings.
Edit: at restart - problem still there. Trying to recall EXACT sequence, before "step 3".
 
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K

kedwa30

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Jul 28, 2011
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I would guess there is an issue with the power supply. That sound you hear might be defective capacitors. If solid electronics are making a lot of noise, it's usually a bad sign. You may need to replace the whole motherboard.
In my experience, a problem with a motherboard resulted in corruption of a hard drive and eventually burning out the power supply. Replacing the hard drive and power supply only resulted in the same happening again. If you have an oscilloscope and a grounded soldering station and know how to use them, you can possibly fix the problem, but if your time is worth more than the cost of a new motherboard then the best option is to salvage the CPU and ram and replace the power supply and motherboard at the same time. Possibly the power supply is still good, but you should test it or replace it to be on the safe side.
 
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StiPet

StiPet

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Jul 7, 2014
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It seems, to me, that the problem is to get into BIOS.
Have tested with another HP (external too) power adapter 19.5 V 3.7 A, original is 19,5 V 6.15 A - still I "should" have been able to enter BIOS settings mode.
UEFI has a way of "protecting unwanted boot attempts".
It all happened when I was trying to boot from an external disk (the original disk, but in an USB dock).
So, did UEFI write something, at that instant, into it's NAND memory to block further attempts?
 
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K

kedwa30

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Jul 28, 2011
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If you have an older PC with windows 10 installed to it, then you have a bios. If you have a newer PC that has UEFI, then the BIOS is deprecated by UEFI. You can turn off the secure boot feature once you are able to boot to an OS. You can also enable a legacy BIOS compatibility mode, but again, you must first successfully boot an operating system to get to the UEFI options screen. If UEFI is preventing you from booting, you should see an "Invalid Signature Detected" error message on the screen. UEFI will not leave the screen blank.

That sound that you hear is probably caused by high frequency and/or high voltage current crackling through a failed component. The screen is probably blank because something is physically wrong with the mainboard and/or power route. Proprietary AIO machines often route power to the monitor through the mainboard. I haven't seen the innards to your machine, so I don't know how your power is routed. If there is a way to connect an external monitor, you might try that just to see what you can see, given the built on monitor seems not to be working.

You were able to install a new windows 10 to an SSD and successfully boot to that. After you tried to boot to the old hard drive, your machine seemed bricked. Did you put back the SSD and try to boot to that?
You might risk damaging the SSD if the problem is a faulty mainboard.

If the problem involves UEFI, this article might help: http://www.howtogeek.com/175649/what-you-need-to-know-about-using-uefi-instead-of-the-bios/

If it is a faulty mainboard and it is too expensive to replace it with the exact part, it is still possible to salvage most of the system and use the salvaged parts with a different board. It looks like a refurbished Loom-G motherboard goes for about $60.






 
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