• Random thunderstorm friend ANOTHER PC
    6 replies, posted
I must have the worst luck... another PC got fried. So aside from two UPS's to buy today... Is this all I need? What happens is upon turning the computer on, it hangs at "Loading Asus Express Gate." Sometimes it'll go past that but says that it can't find the bootmgr. Not hearing any odd noises from hard drives. So, getting this... this all I need? Video seems fine, power supply seems fine (though I do have a backup). [url]http://www.newegg.com/Product/Product.aspx?Item=N82E16813157296[/url] [url]http://www.newegg.com/Product/Product.aspx?Item=N82E16819115074[/url] [url]http://www.newegg.com/Product/Product.aspx?Item=N82E16820231314[/url]
that would get you another running computer, yes. but it says bootmgr is corrupt? try repairing the windows bootloader with a windows 7 disc [url=http://support.microsoft.com/kb/927392]Like this[/url]
[QUOTE=xplicitt;37274899]that would get you another running computer, yes. but it says bootmgr is corrupt? try repairing the windows bootloader with a windows 7 disc [url=http://support.microsoft.com/kb/927392]Like this[/url][/QUOTE] I finally got it to boot. Looks like the secondary hard drive fried... Somehow the bios won't let me select any other drive but that when it's plugged in. Just ordered two more for a raid array.
oke, that was easier that expected.
An UPS alone is not enough to protect you from power surges. Most cheap UPSes only protect against a couple of the multiple types of power surges, and don't offer any protection against other surge types that don't enter through the mains power lines. "Surge Protecting" power strips are in the same boat, they don't protect against all types. Many power surges will enter through a secondary source like phone lines, cable lines, or even jump through other devices (Ethernet, USB, Firewire, etc.) Lightning doesn't even have to strike anywhere. If there is a long run of wire, the EMF in the atmosphere can create enough potential along the wire to fry something at either end while looking for ground. I've had multiple cases of power surges entering through the cable line and blowing out the cable modem, the router, the switch and every Ethernet port on every computer attached to the network. If you want full protection from power surges, you're going to need an UPS with a line filtering system, which are somewhat expensive. You'll also need to isolate your network from the outside world with either a phone line surge filter (DSL) or cable surge filter (cable modem.) I would also isolate the ethernet port on the router from the cable modem for double safety (which is what I do.)
[QUOTE=bohb;37282880]An UPS alone is not enough to protect you from power surges. Most cheap UPSes only protect against a couple of the multiple types of power surges, and don't offer any protection against other surge types that don't enter through the mains power lines. "Surge Protecting" power strips are in the same boat, they don't protect against all types. Many power surges will enter through a secondary source like phone lines, cable lines, or even jump through other devices (Ethernet, USB, Firewire, etc.) Lightning doesn't even have to strike anywhere. If there is a long run of wire, the EMF in the atmosphere can create enough potential along the wire to fry something at either end while looking for ground. I've had multiple cases of power surges entering through the cable line and blowing out the cable modem, the router, the switch and every Ethernet port on every computer attached to the network. If you want full protection from power surges, you're going to need an UPS with a line filtering system, which are somewhat expensive. You'll also need to isolate your network from the outside world with either a phone line surge filter (DSL) or cable surge filter (cable modem.) I would also isolate the ethernet port on the router from the cable modem for double safety (which is what I do.)[/QUOTE] Partly Wrong All UPS's protect from all power surges through the electrical line. The computer is always running off the battery on a UPS with the power grid charging the UPS at all times. During a massive power surge the UPS will take the entire surge usually destroying it. The surge only plugs on a UPS is where the problem is because anything plugged into that isn't filtered by the battery. That part of a UPS acts like any surge protecting power bar, the device plugged into the surge only ports of a UPS are in direct contact to the house power and a large enough surge will go through that to the device. The rest is correct about the Ethernet and phone lines. A lighting charge can even hit the computer directly from being near a wall outlet by passing the UPS and cables. A good friend of mine got zapped recently when the air around his house was charged from a near by strike. I doubt it directly hit his house but he was sitting right beside a metal TV wall mount bolted to the outside wall of the house. A arc shot from that to his head and knocked him out cold for 2 minutes. Same kind of arc can hit a computer directly by passing every thing. Making sure the house has a proper ground and a lighting rod helps a lot too for lightening storms. Still at risk of surges coming through the power lines though.
[QUOTE=Athens;37304314]Partly Wrong All UPS's protect from all power surges through the electrical line. The computer is always running off the battery on a UPS with the power grid charging the UPS at all times. During a massive power surge the UPS will take the entire surge usually destroying it. The surge only plugs on a UPS is where the problem is because anything plugged into that isn't filtered by the battery. That part of a UPS acts like any surge protecting power bar, the device plugged into the surge only ports of a UPS are in direct contact to the house power and a large enough surge will go through that to the device.[/QUOTE] Sorry, but that's very incorrect. First off, there are multiple types of UPS designs. Each UPS design is associated with a low, medium or high cost, depending on how much protection you want. Not all UPS designs offer the same protection as all other UPS designs. Second, there is no UPS design where the protected equipment is run off the batteries [I]while[/I] the batteries are being charged at the same time, it's not possible. If you have a charging circuit charging the battery, you can't also draw power from it because it would destroy the charging circuit. It would also reduce the 3-5 year lifetime of the internal Lead-Acid batteries to a matter of hours or less. Lead-Acid batteries are not designed for continuous heavy loads and the lead plates will rapidly sulfinate, and kill the battery. The standard type of UPS (which most home users purchase because they're cheap) are offline/standby types. They will run all connected devices through a basic surge suppressor and have a switched inverter in parallel with the mains. A battery charger is also connected, which charges the batteries when the UPS is not in use. When the UPS detects a power failure, mechanical switches engage to remove mains and engage the inverter. This process is not instant and can take 20-25ms. This basic type of UPS can't protect you from lengthy brownouts or overvoltages in the line. The next step up is a line-interactive type, which is able to protect against brownouts and overvoltage, because it has a transformer designed for such a purpose and won't use the internal batteries when such a condition occurs. There are even more expensive models that offer isolation and other features, but they run in the thousands of dollar range.
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