I would have to concur with phoenix. You have to start at the basics of troubleshooting. Your laptop should POST (power on self test) it's command
prompt looking screen you get just before booting. A faulty HD will not cause the POST to stop. It will simply say boot failure has been detected.
Most HD today ill have a SMART (Self-Monitoring, Analysis and Reporting Technology) it's a bios setting configuration. It will warn the system user if
a HD failure is imminent. It works good unless there is a significant instant brown out of the electronics of the HD.
You speak of power surges in your home this = bad for computers and it may have even contributed to your problems. Be sure that your power supply to
the laptop is coming out of a surge protecting power strip. I have seen this happen before killing lots of electronics because of household dirty
power. You've mentioned that this does this all itself it could be the battery/power brick/power port combination. Sometimes a power port will need
replaced on the backside of the laptop as it is shorting out. Not sure if you know this or not, but them power bricks not only delivers the power, it
also talks to the bios with a sensor in there that tells your bios information. If this is shorted out or broken in anyway it will cause battery
charging/power issues. It may even lower the performance of the laptop as most laptops will go into a power saving mode once unplugged. So instead of
running at say 1.2ghz full power, it may drop down to 800mhz permanently because it can't tell if it's plugged in or not the sensor is broken. That's
one issue. the power brick or power port may have finally failed but shows green lights as though it's OK. Some laptops will not run on plugged power
without the battery installed.
The next issue is that the laptop could be overheating and needs maintenance with fans checked and cleaned or oiled/replaced. Operate the laptop at a
table or chair with something under it, but sitting on your lap or blanket will kill your laptop fast. There is fan ports that must have airflow or
the cpu will burn out.
Next. No post or blank screen it could be that there is a short in the lid or standby switch. The hinges on laptops have straps of wires running
through them and over time them wires could be shorting out. This could also lead to wifi problems. If you got flaky wifi it could be a short in the
hinge as some wifi antenna wires actually loop around the screen. Also a screen power inverter/ lights have burned out. A power inverter is a device
that has a rectifier in it that changes DC power into AC power and boosts the voltage to light up the crystal back light.
Some of this may or may not apply to your problem. I figured I would post some more as a future reference to help others. As for your case... You said
there is shutdown problem that leads me to believe you have a power brick problem, a battery problem, power port on the laptop shorting out, or dead
bios battery problem. Without actually physically looking at it can't say for sure.
To give you an example of a repair issue I had. The power brick's internal component came unglued inside. it was a power coil. What happen was it came
unglued from the circuit board and the inlet and outlet sides of the copper wires of the coil got twisted around each other and shorted out. Be sure
to unplug for this test. If you give your brick a little shake and you hear a nice rattle that = bad. Don't attempt to repair this unless you are
qualified and know what you are doing. There are capacitors inside that can kill. The only thing I repair on a power supplies is a fan,simple wiring,
simple soldering, repair something like a rubber grommet come loose. Repairing stuff in computers like actual soldering on a component level or
recapping etc it really isn't cost effective even for someone like me. I would like to have a electronic repair bench, but just no room for it and it
costs oodles of start up money. It's easier to just buy a new one and be done with it.
Anyone in this field probably would remember back in the day of bad caps and the ordeal they had with those. I remember having a motherboard from ASUS
that had like 15 flawed caps on it from some off brand company. Most was swelled, but others so bad they leaked fluid out all over the motherboard.
The recap costs would run more than the board cost new. Needless to say I scrapped it for gold and moved on.
edit on 4-7-2013 by sean
because: (no reason given)