What are the detailed and basic steps to cogitate when replacing or changing the toner cartridge of a photocopier machine safely? What should be the indications to look out for when the toner cartridge of a photocopier machine runs out? For how many times can one refill a toner cartridge of a photocopier? Thank you.

What are the factors to be considered to indicate a possible technical hitch that mights occur when using a Camcorder? How do we handle such difficulties when it happens unexpected as a non-professional technician? I am a tertiary student studying chemical engineering in Tunisia. Angela Ortis is my name. Thank you.

What are the basic safety measures to be considered in the use of a HP laptop charger? How do one relate to the cables of the charger to preserve its potent functionality? What are the likely technical problems to be considered to occur with the use of HP laptop charger? Thank you.

What are the professional steps to be considered in servicing a T-P Link device? What are the possible technical challenges that are likely to occur with respect to the use of a T-P Link device for networking? What are the safety measures to be considered in the use of T-P Link? Thank you.

Hi, how are you people today? I am a businessman. Last week I sold a Xbox One Gaming console to one of my honorable customer. Yesterday the customer calls me back and said, My new gamin console isn't responding to me as it should be. So, I tell him to bring it to me. I checked it and he was right. Is there anyone here who can solve this matter?

I am using HP DVD/CD writer with my PC. My HP DVD/CD writer is working fine in windows 7 operating system, but when I tried to use my writer in Ubuntu to read a DVD it is not working and not showing anything from the DVD. As the writer is having no problem, Please suggest some way to use it in Ubuntu also. 

I was using multiport USB port cable, with capability to hold further 5 more ports for connecting to the desktop, I was just curious to know the voltage distribution in those different ports with different number of attached USB devices, like if I attach 1 USB , 2 and so on.

I need help on my Compaq Presario laptop. It has Windows 7 installed on it until suddenly, my keyboard just stops on working. I tried to use it on BIOS and while on Safe Mode, and it's working just fine. I reinstalled its driver and even updated my BIOS to no luck. I also restored my laptop to an earlier working state, but it is still not working. What can I do now to fix it?

I need help on my headphone which I connected In front of my computer. The plug was broke off with its jack. I can't take the broken piece out of my computer. My external speakers that are also connected at the back of my desktop suddenly stops on working. I can see the light when turning it on but there is no sound when I play anything on my computer. Please help me. What should I do?