Power Supply

• Watts - work or amount of power - 250watts
• Amps- Flow (will kill you) higher the amp rating the more dangerous
• Volts- Pressue (USA uses 110-115v
• Ohms- resistance (impedance)

• P8/P9- AT older no power switch on back
• P1/P4- ATX has on/off switch can go into sleep mode

Must go into an AT socket which is a single row and black wires must face each other and chips face out

• Must go in ATX socket which is 20-24 pin double row
• Goes only one way
• Some PS also have added P4 12V 6pin AUX 3.3v and 5v and PCIe 6pin connectors

floppy drive

• 1. CD ROM, R, RW
• 2. DVD ROM, HD, Blu Ray, R and RW
• 3. Super Drives
• 4. Hard Drive
• 5. Zip Drives
• 6. Internal hard drive
• 7. Tape drives
• 8.SCSI devices
• 9. Cooling Fans
• 10. Video Cards

• Yellow - +12V
• Black- Ground
• Red- +5V

black long and flat connects SATA hard drives newer device

• 1. Plugged In
• 2. Check Connection
• 3. Is it turned on
• 4. check AC outlet
• 5. check surge protector
• 6. check UPS
• 7. Check on/off switch on back of PC
• 8. check front panel connectors
• 9. check correct voltage
• 10. check motherboard power sockets
• 11. check for weird noises
• 12. check for dusty
• 13. check for erractic behavior and long shut downs

multimeter, volt meter, or power tester