Hello, Im having problem with my toshiba keyboard. For example when I press the space bar it writes / instead of do the space, or when I press v it writes 4. What can I do?

Hello,
Try restarting your PC and check whether the problem occurs. This problem can occur while you choose num key accidentally or sometimes even due to the damaged key caps. If it's because of the keycaps then contact toshiba service center.

1. You most probably have switched on 'Num Lock' mode on your keyboard. Tty to switch back to the 'normal' mode by pressing 'Num Lock' (NumLK or similar) key or Fn+NumLock (depends on your notebook/keyboard model). In the Num Lock mode on the many notebook keyboards pressing U (not V) will produce 4 and / is located near the space, so may be you keyboard have mapped space key to / sign in the Num Lock mode or you just mistyping (you didn't specified the particular model which is mandatory for such a questions).

2. Some transient software or hardware failure. Try to switch your notebook off then on. Next try to fully cut off power - take off PSU connector and take off the battery from the compartment, then take them back.

3. If above advices will not help, thus your keyboard seems to be some kind damaged. If this is the case, most probable reason is internal line short circuit by the liquid (water, etc), leaked to the keyboard. You can order a new/used keyboard from store/ebay or try to fix yours. Some notebook keyboard (pulled off from the compartment - look for service manual or video for your model) are relatively easy to disassemble, and clean mechanical parts and the button matrix films with alcohol or some similar solvent to to clean off short circuiting oxides and eliminate issues.

Most notebook and some desktop keyboards are difficult to disassemble and assemble back due to the multiple (decades) plastic rivets used to assembly all the layers together. Once you disassemble and separate layers to clean, thus You shall restore rivets some way upon the back assembly (new rivets, soldering iron or some glue). On other hand the desktop keyboards are easy to disassembly/assembly and clean in most cases. Most of them are assembled with a few decades of the standard screws.

Next problem you can experience upon disassembly is a pads and traces corrosion. That's why any electronic devices should be powered off immediately, then disassembled and cleaned ASAP once the liquid leakage occurred. Drying is not enough solution and cannot guarantee some oxides didn't covered parts inside will not [partially] short circuit and/or corrode these parts especially upon current will flow again. Moreover this will most probably occur upon a time once liquid reached some important device components inside. Fixation could not be done later in some cases once corrosion have fully destroyed some components. Damaged traces and pads on the keyboard films which made of some conducting composite with aluminium or graphite powder, could be fixed with a special expensive conductive adhesive (glue). Being an experienced electronic engineer, I have successfully fixed a few boards, but this work is very precision, complicated and time consuming (lost a few hours for every case and was forced to asm/disasm tens of times to precisely sharpen pad layers).