Got a problem that the laptop does not power up and no LEDs light up when power connected to laptop. Stripped the thing down and it worked ok for 1 week, but now gone completely dead .. and I'm thinking that this could be a thermal problem and that either the fan is now dead or processor is overheated. I've got a question on the fan and a question on the processor :-
(1) Would a faulty fan cause the PC not to power up ? .. do the fans fail often ? ... and what are the chances of getting a replacement fan ?
(2) Would a swapout for another sempron processor help in any way ?
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Re: Laptop does not power on !
The fans for most laptops are 2 stage. And again most laptops have a thermal parameter that they operate in. When processors overheat they will shut down.
If the processor is gone, or going, you should still have a light on showing the either condition of battery or elect. supplied.
I was working on a Toshiba that had "ISSUES". Thermal problem caused by fan, fan would go to high speed for 2 sec. when first turned on then stay on low. The unit would not boot, black screen etc, until I removed and reseated the processor. Then everything would be OK for a week then start all over again.
I ended up replacing the power supply brick, processor, heatsink and fan.
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what is the meaning of won't boot. is your laptop powering on or not. did you see any leds lighting up.
if leds are lighting up then it might be a incorrect ram seating or hard disk might be not connected properly.
if no leds are lighting up. then check your system with the adapter connected.
if it is turning on by adapter connected. then your battery is dead. try to replace your battery.
if you have done all of this. just reset the bios. WARNING: if you don't have any knowledge of opening a laptop, then don't do the following steps. it is your responsibility for any unnecessary damage.
just open the back cover and reset the bios settings by removing the CMOS Battery inside the laptop.
if you have done this also. take your laptop to ACER service center
Chances are, you have a bad motherboard. You can try one thing. In my experience, it works about 10% of the time.
Unplug the power cable from the laptop. Remove the battery. Press and hold the Power button on the laptop for 30 seconds (This will drain the power from all components). Put the battery back in the laptop. Connect the power cable. Try to turn it on. Again, in my experience, it works seldomly (I promise I've seen it work several times, though).
If that doesn't correct your issue, you may have a DC jack which has solder joints broken. If your laptop charges "sometimes" but not others, this is probably you. The DC Jack is the component inside of your laptop which the power cable plugs into. Over time, whether you do as much as trip over the cable down to just laying the laptop on your bed (it will sink down and put pressure on the DC jack/power cable), the DC jack may have wiggles itself free of the solder joints holding it to the motherboard. This is not a cheap repair.You can test this by giving SLIGHT upward pressure to the power cable at about an inch away from the edge of the computer. Keep an eye on the front LEDs. If no other LEDs light up, then you probably have a bad power cable. If, when gently pressing up on the power cable, you get an LED to turn ON, then you have a bad DC jack.
In either case, the only fix is to take the PC to a computer repair shop.
I hope this helps and thank you for using Fixya.com.
There could be a problem with the battery. A fast check to determine whether you have a problem with the power
adapter, power cord or the laptop's battery is to turn off the laptop,
remove the battery, connect the power adapter, turn on the laptop &
see if it works.
If the laptop works directly from the power adapter
with the battery removed, then the power adapter is good. In this case
we can suspect that the battery is defective & needs to be replaced.
If this did not work, try also disassembling the laptop & make sure
that all main components are seated properly. Also make sure that all
ribbon cables interconnecting the various components of the laptop are
Verify the AC power adapter displays a solid green or blue light. Older Latitude™ C Series laptop computer AC adapters may not have a light.
Run the diagnostics on the system as follows , connect both the battery and the Ac adapter before running the diagnostics
Ensure the system is powered off.
Remove all external peripherals.
Press and hold the <Fn> key on the keyboard.
Continue to hold the <Fn> key while pressing the power button.
Release both buttons.
Note which lock LEDs are lit (lock LEDS are next to the power button)
The strange operation of those LED's is most probably an error mode indicator. If a laptop fails to power on corectly it will use those LED's, lighting in a specific pattern to signal the error. That's an example. In your case something was damaged in some way because the error code indicator is still acting like there is an error. You may try to reset the BIOS to factory defaults (small chances that this will work) and leave the laptop unpowered for about 1 day. If the problem is still there you will need to have it fixed in a service center. By comparing the LED lighting pattern with information from the Toshiba service catalogs they will be able to tell you what kind of error had happen for wich the LED's to light in this manner.
Sorry for my bad english, I live in a non-english speaking country. Good luck and don't forget to rate any answer received from this site.