Toshiba Satellite M300-ST4060 User Manual - Page 164

164 If Something Goes Wrong Resolving a hardware conflict 3 Remove the memory module, following the instructions in "Removing a memory module" on page 56. 4 Reinstall the memory module, following the instructions in "Installing a memory module" on page 51, and making sure the module is seated properly. 5 Check for the error again. 6 If the error recurs, remove the memory module entirely and check for the error again. If removing the memory module eliminates the error, the memory module may be faulty. If the error recurs without the memory module installed, the error is not caused by the memory module. TECHNICAL NOTE: You must have at least one memory module installed for the computer to work. NOTE For this model Slot A is the bottom slot. Slot B is the top slot. If only one memory module is to be installed, it must be installed in slot A. Power and the batteries Your computer receives its power through the AC adaptor and power cord/cable or from the system batteries (battery, optional secondary battery, and real-time clock (RTC) battery). Power problems are interrelated. For example, a faulty AC adaptor or power cord/cable will neither power the computer nor recharge the batteries. Here are some typical problems and how to solve them: The AC power light does not come on when you plug in the AC adaptor and power cord/cable. Make sure the AC adaptor and power cord/cable are firmly plugged into both the wall outlet and the computer. If the AC power light still does not come on, check that the wall outlet is working properly by plugging in a lamp or other appliance.