Question about HP Pavilion dv8000z Notebook
I thought my power supply cord was going out because the battery would not charge and the plug lights did not come on, so I purchased a new one. The battery is completely dead but when I plug in the cord the battery does not charge and the laptop boots into windows xp fine and then shuts off. I tried using it without the battery and only the plug and it has no power. It is not the power supply cord..for sure...what else could it be?
I had the EXACT same issue on my HP Pavilion DV8000. After reading this thread I started disecting the machine, sure the issue was a faulty internal power plug/cable. It is TRULY a big job, but very doable without special tools. You pretty much have to take every single screw out of the thing to get to that stupid cable.
Here are a few things to know:
1) there are a lot of screws - mainly long black (L 12) and short silver (L 5x2.5). Keep track of all of them in order so you don't end up like me - with 3 leftovers. Lol. There is ONE long black screw that is a little shorted than the others (L 10). This is one I had left over. There are two VERY tiny black ones. I also have one of those left over. There is also a few smaller black ones, too. Just keep them all noted as you remove them and remember where these odd ones go!
2) There are some very flat band cables that plug in to tiny plgs. However thereis no plug on the cable. The flat end just shuves into the plugs. These are very delicate. be gentle with them.
3) When you finally get the housing for the fan loose you can now get to the entire power supply cable. Here is a note: I FIXED my problem by unplugging this cable and plugging it back in. The cable runs under the fan housing, and it seems like you have to remove that housing to get to the cable, but actually it comes out again right next to the processor and heat sink. There is a thin sheet of black sticky insulator tape over the processor and the cable at that point. You'll have to gently remove it. There is not much room there, but you CAN unplug the cable without removing the entire fan housing.
Here is what I did to test this plug and cable. After unplugging it, I shoved a tiny straightened staple (the female plug is very tiny) into the female receptacles for the prongs on the motherboard (red and black only). Then I plugged the power supply in to the power jack. With a DC meter I verified that the female end of the power cable inside the machine was getting juice, and it was.
With nothing left to test, I put it all back together (save three screws) and it is now charging the battery and running from the ad power plug. Whatever I did fixed it!
One last note: There are 4 sequenced screws that hold the heat sink tight. These are under a bit of pressure so the sink is tight. DO NOT remove these as the sink has a heat conducting "goo" that helps it disperse the processor heat. As old as these machines are now, you don't really want to disrupt that "goo" and risk the processor over heating.
I hope all of this typing helps someone.
Posted on Apr 17, 2010
Find out how to open up your computer youself and where the wires run from your ac power plug to motherboard has a little socket it plug. sounds like it is not connected. lol, free advice. Just plug it in
Posted on Dec 06, 2007
I had the identical problem and found a solution, which I hope lasts beyond just a few days. Sadly, it is very labor intensive and requires several hours to complete.
My dv8000 is about 3 years old and this week the power and recharge LEDs would suddenly start flashing simultaneously and the computer would indicate that I was running off of battery power. Unplugging and replugging the power cable solved the problem for several minutes or seconds, but the same thing would happen again. I noticed a very faint clicking sound coming from the DC power jack when the lights started blinking. When the computer was off but plugged in, the battery charge LED was lit, indicating that the battery was charging normally. This led me to believe that the problem was actually a short in the power jack that occured when the computer was running, causing it to break the external DC cable circuit and run on battery, even though the cable is still plugged in. Unplugging the cable has the effect of resetting the circuit breaker.
I followed the procedure for accessing the power cable in the dv8000 repair manual. This is very labor intensive and involves literally taking the entire computer apart. I removed the internal power cable and essentially disassembled the jack-end of the cable. There was no obvious short, but I made sure all the metal pieces were properly alligned. I reassembled it and put the computer back together and so far the problem has not recurred. You can buy a replacement internal power cable from HP, but it will run about $80. I think the root cause is a short caused by a faulty jack, which starts happening when the computer hits 2 or 3 years. No replacement of the motherboard should be necessary. Hope this helps others who have been frustrated with this annoying problem.
Posted on Feb 11, 2010
Same problm here in the UK DV8025EA . Now out of warranty , pile of junk, brought a new Sony Vaio gonna shift the HP on eBay
Posted on Feb 26, 2008
Here is a curious solution. Not tested with time, however, so I will need to update this for certain. This solution is FREE to do. I had an identical problem to
"My dv8000 is about 3 years old and this week the power and recharge
LEDs would suddenly start flashing simultaneously and the computer
would indicate that I was running off of battery power. Unplugging and
replugging the power cable solved the problem for several minutes or
seconds, but the same thing would happen again. I noticed a very faint
clicking sound coming from the DC power jack when the lights started
blinking. When the computer was off but plugged in, the battery charge
LED was lit, indicating that the battery was charging normally. This
led me to believe that the problem was actually a short in the power
jack that occured when the computer was running, causing it to break
the external DC cable circuit and run on battery, even though the cable
is still plugged in. Unplugging the cable has the effect of resetting
the circuit breaker."
I noticed when my dv8000 was running on battery power both power and charge lights would flash in tandem, however when the AC adapter was unplugged the power light would become solid while the charge light turned off. I knew the adapter was drawing power both from the spark it made when being plugged in and its heat so I ruled out the adapter as cause to the problem (only after freaking out, running out the door, going to a computer store, not finding a power cable and rushing back livid- of course).
I unplugged the computer (however, not the cord itself) while on and then turned it off. While off I removed the battery, and plugged the cord to the computers power supply. Turned it back on and after 10 minutes it's still on without problem.
Posted on Mar 15, 2010
Unfortunately, There is another possible problem. Old/dead battery.
Here it is.
HP has an undocumented addition that causes quite a bit of confusion.. You will be working on your system, and if you are paying attention, both the power and charge lights start flashing.. According to HP Support, this is not possible. (not documented). so what does this mean? Your laptop is trying to "retrain" the battery.
Retraining requires that when the battery reaches 100%, both lights flash, indicating the battery is discharging. Windows will try to shut down to protect itself until about 5% (as configured). Then, it powers off.. but wait, the charge light is still flashing.
Now, you just have to wait for it to discharge the rest of the way. Leaving it off could take years (if ever). Turning on Windows could only invite a crash. One nice solution, either enter BIOS, or run a ram test. Once the battery reaches 1%, the power light should remain solid, but the charge light will still flash. (Hidden charge).
Windows will report the battery has 0% or is missing.. unfortunately, BIOS has not released the battery to normal operation yet. once it reaches 100%, it will stop blinking the lights, and the training process will be complete.. So that's it, right? Nope.
If the battery doesn't reach 100% during a normal charge cycle, it will initiate the "retrain" automatically. I have not yet found any way to disable it, or to reload the original bios to the charger.
Unfortunately, you face the same problem I do, buy a new battery for $100 (US), or replace it with another laptop...
Since the display is dying of old age (and much sooner than my first laptop, since it still works), I will probably find a cheap replacement I can torture.
Unfortunately, the only certified HP repair facility in existence resides in Texas (and since I am far elsewhere), I will not buy another HP device.
Shame, HP used to stand for reliable technology. Strange to think Toshiba is making better marks. I am still happy that HP, Dell and Toshiba have their own recovery discs, making life easier when necessary..
Good luck in your quest. (and watch out for Windows Starter.)
Posted on Feb 25, 2010
I had to wrestle with this for a few days. The problem was that I kept getting a "Battery Low" warning even thought I had the adapter cord plugged in. I checked the plug adapter with a voltmeter, and it read 18V, so it was not a faulty AC adapter. It definitely is a design problem with HP dv8000 motherboards. Since the notebook PC was out of warrantee and I didn't want to pay for the repair or to get a new notebook PC, here is a "solution". What was happening was that excess charge was storing in the capacitors on the motherboard. This kicks the motherboard to go from AC power to battery power.
1. First, set your power option to "Max Battery". For those who use Windows XP, go to Control Panel > Performance and Maintenance > Power Options > In Power schemes, choose "Max Battery". This is not the fix but will alert you when to do the procedure that follows. Set warnings that if your battery goes below 60%, it will warn you. If the battery goes below 40%, the PC should hibernate. Save the settings.
2. Shut down the notebook PC.
3. Disconnect the AC plug.
4. Take the battery out.
5. Press the "ON" button and keep it down for 30 seconds to 1 minute. Longer if you have the time.
What this does is it drains those capacitors. This is not a permanent fix. Those capacitors will eventually charge up again but it allows you to keep using the notebook. I think HP discontinued the dv8000 series. HP dv-series are pretty inexpensive. This workaround just allows you to save a few dollars until you are ready for another notebook PC.
Posted on Jul 02, 2009
Ive had the same problem and i fixed it, first of all its usually the power supply, to fix it you have to do some surgery, at the end of the cable, the side you plug it into the laptop, there is a black piece and then theres the piece you plug into the laptop, first cut open the black piece, this may take a while because its pretty thick, after you open it usually there is a wire that got cut because its pretty difficult to get the cable out of the power jack, just solder the cable and it works, did it with mine, dont have a battery but it keeps my laptop running as long as i want it to, hope this helped
Posted on Jun 29, 2009
I had exactly the same problem with a HP DV8000.
Constantly putting the cable in different positions to get the power light to come on.
I downloaded a manual for this unit and found you have to disasseble the whole laptop
to get at this power connector. Considered taking out the screw in the corner and using a dremmel
tool to cut off a small portion of the casing. Eventual the metal connector fell out of the cable from the external power pack. I soldered it back to the cable ( at 90 degrees). Encased it in 5 minute epoxy. Now its better and more robust than the original.
Posted on Dec 24, 2008
Same HP 8000 model here. HP customer support says the problem of having no power is caused by the connection jack in the computer that is a component of the motherboard. $300 to have a 2 yr old notebook that is out of warrantee fixed.
This seems a very common, expensive and very difficult to fix HP problem. The entire mother board has to be replaced or the computer taken apart? These computers should be recalled.
Posted on Dec 22, 2007
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