cancel
Showing results for 
Search instead for 
Did you mean: 
  • ×
    Information
    Need Windows 11 help?
    Check documents and videos on compatibility, FAQs, upgrade information and available fixes.Windows 11 Support Center.
  • post a message
  • ×
    Information
    Need Windows 11 help?
    Check documents and videos on compatibility, FAQs, upgrade information and available fixes.Windows 11 Support Center.
  • post a message
leeroy221
New member
5 4 0 0
Message 1 of 9
425
Flag Post

HP P6 desktop won't power on but has green light

HP Recommended

Hi,

 

So, I have an HP Pavilion P6 desktop that won't power on. The green light on the PSU is solid so there is power going to the system and the power button is fine. 

I have tried the resets but this has made to difference. All internal cables have been checked and are fine.

Is there anything else I can try or any idea on what needs replacing.

Again, as I have a solid green light I assume the PSU is absolutely fine?

 

Thanks,

Lee

8 REPLIES 8
ub6424
Level 9
3,364 3,348 188 327
Message 2 of 9
Flag Post
HP Recommended

Hello @leeroy221 

 

It would be wise to measure the current (V) applied to the motherboard with a multimeter.

 

Please report your results.

 

best regards

---

Dear Community Member, please click the YES button on "Was this reply helpful?" to say Thanks and

make it easier for other people to find this type of solution by marking the reply 'Accept as Solution'.

Do this on the post I wrote that helped solve it.

Thank you very much 

ub6424_1-1655854870631.png

Was this reply helpful? Yes No
leeroy221
Author
New member
5 4 0 0
Message 3 of 9
Flag Post
HP Recommended

Hi,

Unfortunately I don't have a multimeter. Do you have any other suggestions?

Thanks.

Was this reply helpful? Yes No
ub6424
Level 9
3,364 3,348 188 327
Message 4 of 9
Flag Post
HP Recommended

Hello @leeroy221 

 

>All internal cables have been checked and are fine.

The one for switching the computer on, too ? PWR ON connector

 

best regards

---

Dear Community Member, please click the button [ YES ] on "Was this reply helpful?" to say Thanks and

make it easier for other people to find this type of solution by marking the reply ▶️ [ Accept as Solution ] ◀️

Do this on the post I wrote that helped solve it.

Thank you very much

             ⌨️

Was this reply helpful? Yes No
leeroy221
Author
New member
5 4 0 0
Message 5 of 9
Flag Post
HP Recommended

Hi,

 

Yes, just double checked, unplugged and plugged them back in and they are fine. 

Was this reply helpful? Yes No
ub6424
Level 9
3,364 3,348 188 327
Message 6 of 9
Flag Post
HP Recommended

Hello @leeroy221 

 

Like I wrote before ...

=> It would be wise to measure the current (V) applied to the motherboard with a multimeter <=

If you can't do that, you're not going to get it running...

 

Please borrow another working power supply to check if there is a defect on the mainboard.

 

best regards

---

Dear Community Member, please click the button [ YES ] on "Was this reply helpful?" to say Thanks and

make it easier for other people to find this type of solution by marking the reply ▶️ [ Accept as Solution ] ◀️

Do this on the post I wrote that helped solve it.

Thank you very much

             ⌨️

Was this reply helpful? Yes No
leeroy221
Author
New member
5 4 0 0
Message 7 of 9
Flag Post
HP Recommended

Hi,

I have ordered a new PSU, should hopefully come tomorrow. I will let you know how it goes 🙂

Was this reply helpful? Yes No
leeroy221
Author
New member
5 4 0 0
Message 8 of 9
Flag Post
HP Recommended

So... I installed the new PSU and had the same fault, constant green power light but the desktop not powering on. Disconnected and tried again, still the same. Disconnected the new PSU and connected the old one back up, tried that again, still the same. Then thought about the motherboard battery, moved that around tried to power but nothing. Put the cover back on the desktop and was going to take to a repair shop. Before I left I thought I best try it one more time after putting the cover back on, low and behold, it powered on. Now though, I get a bios problem on startup so I need to replace the motherboard battery. I am going to make an assumption that the motherboard battery was the problem all the time? Although, as far as I am aware, it wouldn't normally effect the power, just the bios upon startup?

Was this reply helpful? Yes No
ub6424
Level 9
3,364 3,348 188 327
Message 9 of 9
Flag Post
HP Recommended

Hello @leeroy221 

 

Yes, in this case the CMOS battery (CR2032) could be the problem, put in a new one ( has 3V Voltage ! )

 

 

Please report your results

 

best regards

---

Dear Community Member, please click the button [ YES ] on "Was this reply helpful?" to say Thanks and

make it easier for other people to find this type of solution by marking the reply ▶️ [ Accept as Solution ] ◀️

Do this on the post I wrote that helped solve it.

Thank you very much

             ⌨️

Was this reply helpful? Yes No
Warning Be alert for scammers posting fake support phone numbers and/or email addresses on the community. If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation