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Showing posts with the label NETWORKING DEVICES

TROUBLE SHOOTING FOR NO DISPLAY IN PERSONAL COMPUTER.

  TROUBLESHOOTING FOR NO DISPLAY FRIENDS TODAY I AM GOING TO TELL YOU ABOUT THE CORRECT STEPS TO BE TAKEN IN ORDER TO REPAIR THE COMPUTER IF THERE IS NO DISPLAY.  MEANS THAT WHEN YOU START THE COMPUTER, THE CPU FAN AND SMPS FAN IS RUNNING ALL LED IS ON BUT THERE IS NO DISPLAY IN THE MONITOR. STEP 1  START THE COMPUTER AFTER 30 SECONDS  PRESS NUMLOCK KEY COUPLE OF TIMES.  IF THE NUMLOCK LED IS GETTING ON AD OFF,  THEN THE PROBLEM IS WITH THE MONITOR.  IF THE NUMLOCK LED IS ON OR STEADY ON OR STEADY OFF THEN THE PROBLEM IS WITH THE CPU. STEP2--> SUPPOSE THE PROBLEM IS WITH THE MONITOR  1) CHECK THE AC WALL OUTLET (PLUG) AND POWER CODE WITH THE LINE TESTER OR MULTIMETER.  NOW CHECK THE POWER BUTTON IS ON AND THE BRIGHNESS EVEL OF THE MONITOR.   2) IF THERE IS NO POWER  IN THE MONITOR  THEN THE POWER PANEL MIGHT BE FAULTY.  REPAIR THE MONITOR IF THE POWER LED IS ON, EJECT THE VGA CABLE  FROM THE CPU AND MESSAGE WILL APPEAR ON THE DISPLAY.     3) IF IT DOES THEN THE VGA CABLE OR

NETWORKING DEVICES A GENERAL SUMMARY

 NETWORKING DEVICES USED IN INTERNET CONNECTION: A GENERAL SUMMARY NETWORK DEVICES, OR NETWORKING HARDWARE, ARE PHYSICAL DEVICES THAT ARE REQUIRED FOR COMMUNICATION AND INTERACTION BETWEEN HARDWARE ON A COMPUTER NETWORK. LAYER 4 -> FIREWALL LAYER 3 -> ROUTER LAYER 2 -> BRIDGE, SWITCH LAYER 1 ->LAN CARD, REPEATER, HUB, MODEM, ACCESS-POINT. NETWORK INTERFACE CARD(NIC) A LAN CARD IT IS A LAYER 1 DEVICE.  IT IS USED TO CONNECT A PC, LAPTOP, WORK STATION AND A SERVER TO A NETWORK. A LAN CARD IS BUILT INTO A MOTHERBOARD BUT WE CAN PURCHASE ADDITIONAL LAN CARD ATTACH IT IN A PCI OR USB SLOT.  EVERY LAN CARD HAS ITS OWN MAC ADDRESS. REPEATER REPEATER IS A LAYER ONE DEVICE. IT WORKS LIKE N AMPLIFIER, BUT REMEMBER APLIFIER WORKS IN ANALOG SIGNAL WHERE REPEATER WORKS IN DIGITAL SIGNAL.  IT IS USED TO FIX THE PROBLEM OF ATTENUATION. HUB IT IS ALSO A LAYER1 DEVICE IT WORKS LIKE A REPEATER BUT REMEMBER REPEATER CANNOT BE A HUB.  A HUB CONTAIN 4, 6, 8, 12, 16 PORTS.  HUB REGENERATE AND IN