3 long & 4 short beeps repeats 5x before shutting down error.

[elphaza]

Hi everyone,

My Hp envy 34 curved all-in-one only gives the led flash/beep code error of 3 long followed by 4 short, high pitched beeps. This cycle repeats 5x before it turns off again. The screen stays black but does work when used as a monitor through HDMI in port. I've gone through the forum / what else I could find, trying to take wireless keyboard & mouse USB dongle out, changing memory, changing power supply - quite a few things, but with no luck. 
I hope someone here has some advice.
Thanks in advance!
Regards.

[itsmyname]

@elphaza -- please read: Solved: 3 Beeps 4 Beeps - HP Support Community - 7602379

for a possible solution to your issue.

Was your computer previously working correctly, for a long time, before the symptoms appeared?

If this is a brand-new system, either take it back to the retail store that sold it to you, and exchange it,

or contact HP Support, to open a claim against the 12-month warranty, for HP to repair/replace your computer, at their expense.

[Prométhée]

Hi

yes , but @elphaza  try this before

Getting error unsupported adapter installed - HP Support Community - 6145827

[elphaza]

Hi there, thanks for your response. The computer was working previously, although I bought it from a friend without the processor, as I have an i7 8700T CPU spare (confirmed working). The system is unfortunately just out of warranty, however.

[elphaza]

Hi there, thanks for your response. I don't however get the 'unsupported adapter installed' error - there's nothing on the screen during the beeps or after before it shuts down. After reading through the thread you suggested & seeing the volatilities other customers have experienced, do you think it could still, even though it should be compatible with the motherboard, have something to do with the new i7 8700T CPU I installed?

[Prométhée]

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@elphaza wrote:

Hi there, thanks for your response. The computer was working previously, although I bought it from a friend without the processor, as I have an i7 8700T CPU spare (confirmed working). The system is unfortunately just out of warranty, however.

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https://support.hp.com/us-en/product/hp-envy-curved-34-b100-all-in-one-desktop-pc-series/17199806/mo...

Processor

Intel® Core™ i7-9700T (2 GHz base frequency, up to 4.3 GHz with Intel® Turbo Boost Technology, 12 MB cache, 8 cores)

• TDP: 35 W
• Socket type: LGA1151

Motherboard supports the following processor upgrades:

Processor	TDP
Intel Core i7-8700T, Hexa Core, 2.4 GHz, up to 4.0 GHz with Intel Turbo Boost Technology (Coffee Lake)	35 W
Intel Core i7+ 8700T (Core i7 and 16 GB Intel Optane memory) Hexa Core, 2.4 GHz, up to 4.0 GHz with Intel Turbo Boost Technology (Coffee Lake)	35 W
Intel Core i5-8400T (Coffee Lake), Hexa Core, 1.7 GHz, up to 3.3 GHz with Intel Turbo Boost Technology	35 W
Intel Core i5+ 8400T (Core i5 and 16 GB Intel Optane memory) Hexa Core, 1.7 GHz, up to 3.3 GHz with Intel Turbo Boost Technology

For me no direct link, since visibly compatible, the error code, would correspond to the power supply
unless mishandling during replacement..?!
But I was just telling you to try it just in case, there is no message displayed.
"It makes a series of 3 beeps then 4 beeps and then pops up that there is an unsupported adapter installed and shuts back down will not go to the startup menu."