After using your laptop for several months or years, you may see blank when you turn it on, or just that it does not turn at all, which may indicate a dead motherboard or processor . While the repair parts of a laptop is a process more difficult than for a desktop computer, it can still be done with a standard set of tools in your kitchen or home office.
This is what you need:
Separate power cord
1. First Check your physical connections first ensure that the problem is with your wall outlet or cable. Put the computer in a separate decision and try a spare power cable to see if your laptop not come at all. Remove the battery from the laptop by pressing the latch on the battery and remove it. Wait a few minutes and plug it back in. Try turning the laptop again and see if it will be on.
2. Shine a flashlight on the LCD monitor and look blurry images, when available, but there is no clear picture on the screen. If images appear weak again, the bulb must be replaced. Remove the battery and pull the rubber off the screen. Remove the screws beneath the rubber, and then pulling out the piece of plastic below the screen. Remove the hinges holding the screen in place and pull it out. Remove all remaining bolts to fully remove the laptop screen. Pull the tube of metal or plastic, brake, bulb and replace it with a new one.
3. Connect a third standard desktop monitor to the appropriate port on your laptop as a serial number, DVI, S-Video or USB. Power your laptop and see if an image is displayed on separate screens. Take the laptop to a repair center for reversing its board replaced if you can see an image in separate screen. Disconnecting external display if no image is displayed at all.
4. Take your Toshiba Satellite P300 laptop battery. Remove the large plastic piece between the keyboard and the top half of the screen by dragging a flat object like a screwdriver from its hinges, then lift the bottom. Disconnect the cable connected to the motherboard. Take all the screws holding the keyboard and the display hinges in place, and then delete them. Check for obvious damage to internal components, such as a stroke. Use compressed air to spray dust and dirt that covers all parts.
5. Remove all screws and remove parts like hard disk and graphics card. Pull the motherboard. Set the motherboard and set the external monitor directly into the appropriate port. Plug the cord into the adapter and press the button on the motherboard. Waiting to see if the processor fan is not. Replacing the motherboard altogether if the fan does not turn on.
6th Replace the processor if the fan is running, but the laptop still will not show anything on the external display.
Not all laptops have a port that can accept a remote HP G70 battery. If so, you must buy a converter cable to convert the office is the string in a format that your portable port could accept such a serial to USB.
Be very careful not to touch the processor, or metal parts of the motherboard when connected to a power cord that can shock or cause damage to the motherboard via an electrostatic shock.