Question about HEWLETT-PACKARD Computers & Internet
This netbook won't power up even if power supply is fine and if there is battery the orange LED battey loading works. When I put external power also the LED near the DC jack goes on but nothing more. Alreadty tested the power on switch that is fine. Things I've done: -removed every external components. (keyboard, RAM, display cable, USB board, speakers, mic and BIOS battery) -tried an hard reset and a BIOS reset shorting CMOS battery pins. -re programmed from outside SPI BIOS chip. -tried a "soft" reflow of the Intel chipset I was also looking for some damaged component, but alls looks like fine. I noticed that without battery the board absorbs around 0,05A that maybe is a bit too much.
Why make it worse , messing with BIOS like that.
if the battery BIOS is over , 2.9v its good if not replace it
and never short batteries out ever, that is web BS you read.
test one is does it run with main battery removed, y/n
no, does BIOS come up, with line power only
no bad, if bad then check for 19vdc at the line pack.
18.5v is lowest i think, 50ma is not good off.
if power is correct, 19v, then and BIOS is dead.
then remove ram and all things, like you did and is correct actions.
still BIOS is dead (means screens BIOS DEAD)
yes, dead then the MOBO is bad.
whats bad on it who knows/?
3million transistors there to fail.
why mess with it? circa 2009?
i bet that reflow made it worse. (its not trivail that)
did you pull all non ecential parts off mobo?
is the fan dead, if yes, the MOBO is toast.
the fan must come on, power on. on most HPs.
dead cold booted/
the cpu has compound but the other chips have thermal tape.
that must be correctly applied. as the manual directs you.
ebay has used MOBO for near nothing
most owners hat this Mini, its slow. ( i have one parked in attic)
so parts are cheap on it. dirt cheap why work so hard fixing a slow ATOM processor notebook, slam in a MOBO if you must.
Buy one that is for sure guaranteed No DOA. or pass....
Posted on Apr 23, 2017
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Posted on Jan 02, 2017
SOURCE: acer not work
Acer Aspire One BIOS Recovery
The AA1 has a built-in BIOS recovery routine, making it possible to
flash the BIOS even if the system doesn't boot anymore. It's only meant
for emergencies and may void your warranty, so use at your own risk.
Follow every step carefully!
First format an USB stick with FAT.
Download the latest BIOS, and put both FLASHIT.EXE and the BIOS file in the root directory of the stick. Rename the BIOS file to ZG5IA32.FD, that's important. Do not remove the USB stick.
Turn the AA1 off, make sure both battery and AC adapter are connected. Press Fn+Esc, keep it pressed and press the power button to turn the AA1 on. Release Fn+Esc after a few seconds, the power button will be blinking. Press the power button once. The AA1 will now initiate the BIOS flash, do not interrupt it under any circumstances. After a while the power button will stop blinking, and the AA1 will reboot shortly after. Wait patiently.
The BIOS has been flashed and all settings reset to default.
If for some reason you made a mistake during the procedure and it doesn't reboot by itself wait 5 minutes before turning it off, just to be safe that it isn't still flashing the BIOS.
Download WIN98BOOT.ZIP and HPUSBFORMATTER from the internet normal bootable like a diskette won't work with a usb stick
I had mine 2 months it's a common problem with the notebook.
The onely thing that you have to do is download these programs with someone with a internet connection.
Posted on May 25, 2009
SOURCE: HP Pavilion dv2500 - FTB
The troubleshooting you have done seems to be fine. It does not seem to be a problem with the power supply,cord or battery.Did you try a hard reset. If there is a reset button on the bottom of your laptop, you might want to try pressing that with laptop plugged in, not plugged in, with battery, without battery and different combinations thereof.
If this does not work or you don't have a reset button read on.
Before assuming it's the motherboard, there is one other possibility. There is a part called a PCA switch. It is possible this switch has gone bad or a plug might have come loose.
If you are comfortable with doing your own work, you can obtain a repair manual for your laptop online. Within this manual, it should explain what is involved in replacing this part. It is really not too complicated.
It does not sound like a hard drive problem simply because it doesn't seem to be getting power to any other part of the laptop.
You can try these steps.
Posted on Aug 03, 2009
Do the following without the battery inserted.
Let the computer sit with no battery for 24 hours. Do not put the battery in at all. Try using your original memory stick ONLY, with no hard drive and see if it will POST. If it does, insert the hard drive and try again. Could be the new memory...
Another thing you can try is reseating the processor. Turn the ZIF screw, take the processor out (WATCH THE PINS!!) and put back in GENTLY. Leave the memory in the computer, hard drive removed, try to power on.
These models have been known for bad motherboards. Contact HP and arrange to send it in. If you do enough digging on HPs website, you'll find the service advisory.
-Dell & HP Certified Technician
Posted on Oct 29, 2009
It's time to take the computer to a qualified technician, for proper trouble-shooting & repair, because there are very-few "user-repairable" parts inside a laptop/notebook computer.
Posted on Jan 21, 2010
If it cannot finish POST then you have a mother board problem.
You state you reset the BIOS. Can you get to the BIOS menu? If you can then the problem is not motherboard errors but hard drive boot sector problems, depending on OS used.
If the BIOS has been updated, then it is possibly an incorrect version or corrupt.
If you can reflow the soldering, remove the BIOS chip and fit a known good one. That should fix your problem.
Hope this helps.
Posted on Nov 23, 2010
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