My laptop wont switch. the mains light on the front is constantly flashing and when i try to turn it on it will start to run and then shuts down after 1 - seconds. can you suggest a course of action please
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I heard of many power issues with these models. Mostly concearning the battery, it sounds like this may well be the case from the 'light flashing' issue.
The other problem involving slow start up/ being laggy could be down to the machine running hot and Windows is using passive cooling in the power options, or a failing hard drive can also cause software problems.
Remove main battery and try again, if no! remove ram memory one at a time and test each, if still nothing! the DC jack is a common source of trouble, at this point the laptop must be dismantled to address the motherboard, I recommend a technician to take it to the next step.
I could well be wrong, but my gut feeling is that your laptop is having memory issues. Start by accessing the memory and (carefully) removing it from its seating. Give it a quick check for dirt / dust etc and then re-seat it. If you have multiple memory modules, try swapping them round. Replace all covers and then restart the computer. Hopefully it's as simple as that. If not, you may need new memory, or alternatively the beep codes for your laptop refer to something different.
If you can get some Compaq support online, check that out for a dagnosis of the beep codes. That might point you in the right direction, assuming the above attempted solution is of no use.
Have you tried attaching an external monitor when the LCD screen is disconnected from the motherboard? this connector is located under the keyboard strip – a piece of plastic just above the keyboard. If it works, this way, then the video cable isn’t seated properly in the connector on the back of the screen.Plugging the video cable back in should fix the problem. I don’t know how comfortable you are with taking apart laptops but I think that this information could be useful for you. Source: http://www.asklaptopfreak.com/laptop-notebook-help/2006/08/08/laptop-powers-on-and-shuts-off-immediately/
when upower up press F8 key then enter in enable vga mode. then set screeen resolution to 1024*768 and if u r not abled to login enable vga then enter in safe mode. then go to start menu run then type in run "chkdsk /r" thats it then restart it then it fix error on hardddisk.