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Lightning Stike


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#1
Brilliant Ken

Brilliant Ken

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Hi there! Just recently my computer got struck by lightning. The modem was burnt and the monitor went completely blank. However, the monitor itself apparently turned out to remain fine and intact but the CPU no longer starts up(no response at all when power button is pressed). As such,which components could have been most likely damaged by the lightning strike? I myself suspect the motherboard...... Could the surge have entered my PC via the external ADSL modem which was connected to the phone line and plugged into my com's USB port? Thanks for enlightening. Help much appreciated.
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#2
austin_o

austin_o

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Hi and welcome to Geeks to Go. Does the power supply fan run when you power it up? This would be the place to start. Any cable connection (a conductor) at the computer is a possible conduction path for voltage/current during that lightning strike. Fuses and surge protectors do provide some protection. You mentioned the modem was burned. This has a connection to the phone line. The lightning voltage entered your computer through this path (maybe others as well). Hard to tell how much damage. You will need to work your way through this component by component. A multimeter (DMM) would be helpful. If you turn on the power supply and its fan runs, and there is voltage present on the output cables that connect to the mothboard and other components, it is ok. Then move on, step by step, component by component. Next would be examining the motherboard, once you are sure there is power to it.
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