Push button after press any key to turn-on

Question

Hi guys
I've notebook toshiba model: L515-SP4011L and the problem is: that push it button to start, turn on but don't show screen after press any key notebook and show logo toshiba wait a moment for turn-on, after follow  don't show screen press key newly and start system, that's windows 7.
Any idea ..., restore by default BIOS ... But not solved.
Greetings

Answer 1

For posterity, here's what the hybrid MBR looked like after repartitioning with Boot Camp Assistant on Snow Leopard:
$ sudo fdisk /dev/disk0
Disk: /dev/disk0 geometry: 9729/255/63 [156301488 sectors]
Signature: 0xAA55
         Starting       Ending
#: id  cyl  hd sec -  cyl  hd sec [     start -       size]
1: EE 1023 254  63 - 1023 254  63 [         1 -     409639] <Unknown ID>
2: AF 1023 254  63 - 1023 254  63 [    409640 -  107421872] HFS+       
3: 0B 1023 254  63 - 1023 254  63 [ 108095488 -   48205824] Win95 FAT-32
4: 00    0   0   0 -    0   0   0 [         0 -          0] unused
and here's how it looked after formatting it with the Windows XP SP3 installer disc:
$ sudo fdisk /dev/disk0
Disk: /dev/disk0 geometry: 9729/255/63 [156301488 sectors]
Signature: 0xAA55
         Starting       Ending
#: id  cyl  hd sec -  cyl  hd sec [     start -       size]
1: EE    0   0   2 -   25 127  14 [         1 -     409639] <Unknown ID>
2: AF   25 127  15 - 1023 254  63 [    409640 -  107421872] HFS+       
*3: 0C 1023 254  63 - 1023 254  63 [ 108095488 -   48205824] Win95 FAT32L
4: 00    0   0   0 -    0   0   0 [         0 -          0] unused
Not sure if there's other incantations that the XP installer does to the disk, but it's strange that the assistant didn't take care of everything. That step is particularly important if you're restoring a .dmg of the original FAT32 partition after replacing a hard disk.