Respectable Sir, I have a Toshiba Qosimo.Suddenly Screen gone to black and there is harddisk activvity when power on looking working properly but without screen, please help me out from this situation. With Regards.

Dear Sir,
This problem indicates that your laptop screen display panel is faulty, so replace it with new one,it will solve your problem.
I think it helps. let me know.

ok try the laptop on a pc screen on the side of your laptop is a socket for a moniter to be pluged in if that works then its the screen try also a light shining onto the screen sounds like the screen reg is gone

1 either ur VGA card is corrupted or
2 RAM is corrupted
3 Last may be your motherboard is gone - not sure

It can be that the backlight inverter boards (2) have gone out, look to see if you do have 24vdc feeding the board, otherwise it can be bad power supply, look for bad caps.
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if that error occurs while attempting the recovery, typically it indicates a read write error on the hard drive. replace the hard drive and see if the recovery finishes.

(although i have only seen this problem with failing hard drives)

Sir my harddisk drive is not working
please give to me Delhi Service center number

if it can boot up windows, then the harddisk is not locked(anymore, after entering the correct password),
a slow performance of windows can be sped up by performing a harddisk defragmentation (open windows explorer, right-click onto harddisk, switch to properties,´then 'extras', perform a defragmentation for drive c:, give it time to finish)

to fix the arkward dvd/usb prob:

again open up win explorer and see if cd-rom drive is available, therefore recognized by windows at all.. if yes test-insert Original CD again, see if it can open it(does the CD/DVD-drive LED flash green several times and do you hear any noise from it?)

if not, shut down and enter BIOS while booting hitting either the Del,F1 or F2 button and look if under IDE devices the CD-is recognized by the laptop itself...
if not, set auto detecton for IDE- devices, go
through available menus until u find USB legacy support, enable as well, exit saving changes, reboot.
Again enter BIOS then change
BOOT DEVICE order sothat CD-drive is 1st,
any 3.5'' floppy drive second and harddisk 2nd or 3rd, exit saving changes again.
reboot and let windows come up again. check for cd/dvd-drive again(see procedure as described above), check if windows does recognize your usb-device(mp3 player) now.

if that does not work and during booting you get message'bad CMOS checksum error' you will have replace the CMOS button-battery on
the mainboard, for it may have gone flat...

this means disassembling the laptop
if that is the case, see a technician to work for you or come again with another query.

hope i could be of help

what if u uninstall the driver,?? secondly from the startup menu, select vga safe mode and check if still it restarts,,let me know

I don't belive you can very easely. Then again, you might, but never from any motherboard that escapes from the qosmio series laptop. Remeber you are contrained to the laptops chassis, not that much space, and the plug exits aren't changeable.