When i switch on my laptop its beeping 7 times and cannot boot

SOURCE: Beeps at Boot Up, but doesn't actually Boot Up.

u can try to take off the hdd, and at the same time, pls clean the memory slot in your laptop with a brush & some liquid solvent.. After that, try booting it without any HDD. If u did not see any error messages, try take out the CMOS backup battery and neasure its voltage or get it replaced. Pls revert...

SOURCE: IBM Thinkpad T30 2367 beeps 8 times

Hi,
It's your memory, or more to the point, the memory slots. take all memory out, install 1 piece in the slot closest to the back of the laptop, push down on the memory as if pushing it into the motherboard, and hold pressure while booting.
Bet that works. if not, let me know.
I've got the same machine.
Good luck

SOURCE: HP laptop not booting up - blank screen

hi
I had the same problem faced twice in one month, and it’s a new laptop just one month old,
I have removed battery for for few minutes and fixed it back. And it's working fine now.
If it continues what should I do?

SOURCE: Laptop won't boot up. Only 3 beeps.

listen to the beep heres some information on beep code errors
Beep Code: Description of Problem: No Beeps Short, No power, Bad CPU/MB, Loose Peripherals One Beep Everything is normal and Computer POSTed fine Two Beeps POST/CMOS Error One Long Beep, One Short Beep Motherboard Problem One Long Beep, Two Short Beeps Video Problem One Long Beep, Three Short Beeps Video Problem Three Long Beeps Keyboard Error Repeated Long Beeps Memory Error Continuous Hi-Lo Beeps CPU Overheating

SOURCE: boot up beep and blanck screen

The beep patterns always tell you what the problem is, but it depends on what kind of BIOS is in your computer. You can take a look here, maybe you find what is the problem with your machine: http://www.pchell.com/hardware/beepcodes.shtml