The RC500 just shuts down and when you press the power button it is dead if you leave for a time up to a day sometimes it boots up fine and other times you power it on and it can takes 2-30 seconds and shuts down again without warning i also know of at least 1 other machine with the same fault (could this be anything to do with the power supply if so what type of replacement do i need)
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I am guessing that your phone probably shut itself down to prevent data loss. When was the last time you shut it off by holding the top power button until it says slide to power off and then powering it off? I may be wrong in this but,... Okay, so have the phone unplugged and I want you to press and hold both buttons at the same time, the Top Power and the Home Screen Button and just continue to hold them, sometimes even for like a minute but I'm guessing within like 30 seconds or so the Apple logo will appear then you can release the buttons. If this does work you can prevent this from happening again by power cycling your phone on a daily basis or at least every other day. :-) I hope it helps good luck.
It's not good to leave your laptop hanging like that. Press and hold the power button until it turns off. If you are unable to turn it off by holding the power button, press ctrl + alt + delete at the same time. (all three keys) Then choose windows task manager. Click on "shut down" and wait for the pc to turn off.
fails battery out so leave it out they love to short.
so when it fails test 2 is, hit the F10 or ESC key promptee
went it fails to boot, check BIOS key first, if BIOS fails.
be more clear.
what does it do when it wont turn on.
BIOS dead. screen 100% dead, and not even text
BIOS works even with HDD and DVD drive pulled.
that is the acid test on PCs.
the screen must say, hit F10? or ESC to enter setup, means HP BIOS. it must or power is no good. get a new power pack
the shut down tell me lost power, that can be the power pack 19vdc
or the jack at the mobo if failing to said pack.
try side pressure on that jack if at anytime the power button fails.
it self shuts down, I got that but lets fix , cant boot first.
that is how to fix this.
power on failures, are you saying the power key fails. some times
and the fan does not run every time.?
this old LT uses CCFL back lamps.
that love to fail. so when it shut down did the fan die.
did the HDD stop spinning ear to bottom? if not the CCFL is failing.
using and external monitor proves this every time,
do the flash light trick?
I experienced this very thing today. Disconnect everything and then reconnect. Make sure that every connection is accurate and also make sure that the spacers, or gold screws in between the case's body and the motherboard, are in place. If the fans are starting for a split second and then the computer shuts off then this should fix your problem. Otherwise if you're using all of the same components I can't think of any reason this should happen.
This sounds like a short of some kind from the motherboard touching either the body or some other peice of hardware, or you have a broken soldered joint on the board causing the problem.
I would take to a qualified repairer.
It sounds like the CPU is overheating. When the system boots up, can you hit the DEL, ESC, or F12 key to get it into BIOS mode? Often, there will be a setting in there to monitor the processor temperature.
If you can get it into that screen, leave the computer in that mode and keep checking the temp.
Make sure the machine itself has good air circulation and isn't in a hot spot in your house (for example, where sunlight hits the main box) If it continues to flounder, you'll probably need to upgrade the CPU fan or install a heat exchanger fan...