Laptop won't boot - just black screen

[NikJak]

My laptop ran out of battery yesterday as it was left on and unplugged and now it won't boot up - I have had this problem before but it has ususally sprung into life after a couple of hours. This has been trying all night with no scuccess The battery is fully charged now. I switch on and the Toshiba Solutions front screen appears and then it goes to a black screen and won't follow thru to open up windows. I can get into the Boot Manager (which I couldn't when the harddrive needed replacing a few months ago) but I am not technical and so I have no idea what to do once I'm in Boot Manager. Every now and then it goes back to the Toshiba schreen and the fan starts whirring again and then back to the black screen :-( Can anyone help?

[Mosaic]

Once I had a similar problem and this worked for me: switch off, remove the battery from underneath the laptop. Wait a couple of minutes, replace the battery and try switching on. For a reason a do not know, this got me into the laptop.
The same laptop (a Toshiba) also started doing that thing about going into DOS mode when switched on - I just followed the instructions to exit DOS and it opened as normal. However, the laptop in question was clearly on its last legs. It also took to crashing randomly, then when it woke up again it thought it was 1998 if you loked at the date / time settings.
I found I was able to use it offline and without AV software for a while - the AV seemed to really upset it and slow it down - but in reality what I did was use the 'respite' time to remove my important files and us another computer cos the tosh was screwed.

[NikJak]

Yes, I've tried removing the battery etc.. I've read on other forums about going into boot manager (or start-up or something) and restarting from the last known good point but I have no idea what that means.

[ummmm]

That would be a system restore.

I think you press F8 on start up.

[TTG]

Boot into recovery console if system restore does not work. Issue the command fixboot.

if that does not work you will have to use recovery console to restore system to factory settings. You will lose all loaded programs and files so use with caution.

Recovery console is either a boot option on starting up your computer or if that's not available, boot from your original windows cd if you have it.