Member Avatar for Ollliver

my laptop wont turn on, it turns on for 3 seconds then restarts, and it just keeps repeating, i dont think its my ram or anything, what could it be? please can someone help.

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  • Latest Post Latest Post by rob2uk

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Multiple members report the same symptom: the nx9005 powers for a few seconds, then cycles off and repeats. started the thread; suggested a fan/thermal issue, while and both noted that removing HDD/RAM (and in 's case swapping the BIOS ROM) did not stop the behaviour. A few replies linked a broad HP-series fault and others (for example ) disputed that relationship. Taken together, those posts narrow the likely problem away from drive/RAM or a simple BIOS image and toward board-level power or component failure.

Suggested diagnostic sequence (low risk first):

  • Verify the AC adapter outputs the voltage printed on its label; try a known-good adapter of the same rating.
  • Remove battery and AC, press and hold power for ~30 seconds to discharge capacitors, then try powering with AC only.
  • Disconnect all removable devices (HDD, optical, mini-cards, external display) and attempt a minimal boot with one RAM module in the primary slot.
  • Watch for fan spin, LED patterns or any beep codes; test with an external monitor to rule out panel failure.
  • Check the DC jack for looseness or intermittent contact while monitoring adapter voltage.
  • Visually inspect the motherboard for bulging capacitors, burn marks, cracked solder or loose components.
  • If competent with instruments, check the presence of the main rails (only after reading safety guidance): adapter input, then the board’s 5V/3.3V rails.

If the cycle persists after these steps, the failure most commonly points to power regulation components, a shorted MOSFET/IC, or BGA solder-joint failures — all of which are board-level and usually require professional repair, reflow/reball, or a replacement motherboard. DC-jack replacement is the least invasive board repair; reflowing or replacing BGA chips is higher risk and cost. Exercise ESD precautions and avoid mains work unless experienced.

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All 10 Replies

Member Avatar for Sig

hi there i would have a look to see if your fans are working as it might be them and making the laptop turn off as it will be over heating.

Member Avatar for stophi

Hi,

Did you find a solution? I have got exactly the same problem with my nx9005. After hanging up while loading ubuntu i resetted it. since that point it restarts 4 times after switching it on and only shows a black and lightening screen.
It does not change if i plug on or off the ac-adapter or if i remove ram or hdd.

thanks for answering,

Christoph

Member Avatar for matwillis

I also have the problem. Does anyone know the answer?

(I can confirm that the BIOS is not at fault, as I actually replaced the ROM chip with one loaded with latest 1.60 BIOS, and the same thing happens.... 4 power cycles than power light stays on, but nothing else)

Matt

Member Avatar for luckysinner

Ditti on this problem... any answers out there? Thanks

Bob

Member Avatar for hm2k

I also witnessed this fault today.

I've yet to find a solution to this.

If anyone knows of a solution to this, it will be gratefully received.

Thanks.

Member Avatar for EMCCleveland

Hi All, OK I think I'm going to have to create a special thread for all of the HP / Compaq people out there with this problem.

Unfortunately for you the HP Pavillion DV2000 / DV6000 / DV9000 which this is based upon have a fault on the board that causes these exact problems along with a series of related ones. Please reference this link:

and this thread:

http://www.daniweb.com/forums/thread130236.html
Unfortunately I believe that this series also has these problems as well but, until HP acknowledges it and people bring enough pressure to bear on them it may be difficult to get them to respond.

Member Avatar for hm2k

Not to sound rude, but how exactly does this help?

More so, how do we know that the NX9005 is based on the Pavillion DV* series? Apart from taking your word for it...

Thanks.

Member Avatar for EMCCleveland

Actually, I would encourage you to read the info at the link and you will see that the symptoms are the same as what you are experiencing. I encourage anyone with these problems to bring pressure on HP perhaps even pointing out the information I cited and try for your best results.

Member Avatar for hm2k

The problem identified in the first link http://www.daniweb.com/forums/thread130236.html does not mention "restarting" at all, neither does it mention the relationship between the models. I'm failing to see the connection.

Likewise, the second link talks about an "Limited Warranty Service Enhancement" for a model, that is not the model I am discussing.

Further more, I don't quite understand how you propose to "put pressure on HP", the suggestion is about as productive as throwing pennies in the ocean.

I get the impression this is just a wild goose chase.

Member Avatar for rob2uk

The nx9005 is NOT based on the dvxxxx series, and I'm at a loss to understand how you would think it is.

It uses a different motherboard, different heatsink, different GPU and a completely different processor type, as well as preceding the dvxxxx series by at least 3 or 4 years

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