Power hit causes lost previews

I took a power hit yesterday when using LR.
Now when I open it, most of the thumbnail previews are missing. The grid boxes are there and the metadata in the righthand panel is there. The photos (the actual files on disk) are there, of course.
When I exit LR I try to back up the catalog. I get a Warming message that says "Lightroom encountered an error when reading from its Preview cache and needs to quit. Lightroom will attempt to fix this problem next time it launches." I hit OK, then the program hangs and I have to force it to exit.
It sounds like the power hit may have caused some portion of the preview cache to be corrupted. If so, though, why would LR not detect a problem when it opens? Since it hangs later, perhaps the catalog was corrupted as well, though again it opens fine and the metadata seems to be OK.
Any suggestions as to how to go about repairing this with the least amount of damage or lost work?
Dale

How much wattage depends on what you want it to _do_.
For example, at home I have a .. uhmm. rather large setup. It will hold my computers, routers, firewalls, fileservers, etc, up for almost an hour.
Overkill? yes, but at the time I got them (I have two), I was living in a place where power would go out for 20 minutes at a time randomly and I got tired of it. I have them hardwired into special electrical plugs mounted on the wall, and the units are in the basement. (Funny story: right after I got them up and running we got a power outage. Lasted 1 hour 10 minutes. Sigh.)
If all you are looking for is 3-5 minutes of power to give you time to shut down or protect you from power surges, then you want about double the amount of wattage your system is using now. If your computer uses 400watts, then look in the 750 watt range. Higher power will increase your time/amount plugged in. Some units (larger ones) you can also buy external battery kits to add time.
A KEY feature to look for in smaller UPS unit is that it conditions the line, not just one that jumps in as needed. In other words, it is always "on" and making power for your systems. That way brown-outs, spikes, etc, can't get through it because you're never really running on grid power. Yes, I've picked up a couple of small units for my last work place, so I know the make them.
I prefer APC units, they are sturdy and plentiful, rack mount and batteries are easy to change when needed.
Cheers!

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BT Dispute - Power surge caused damage to the Fron...

I am currently in dispute with BT re Engineer Call Out for £99. His report states that a power surge caused damage to the NTE5 (Network Terminal Equipment) Service Specific Front Plate which caused me to have no dial tone. Broadband Infinity was unaffected.
He told me at the time that there had been a lightening strike in the area and was having to change face plates for a lot of customers but the official report states "I arrived at the site and found that the fault was on the NTE5 (Network Terminal Equipment) Service Specific Front Plate due to power surge. I changed the plate. The eclipse was tested OK. I tested and demonstrated the working of the line with the customer"
Is a power surge a feasible explanation? What would cause such a situation?

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Lightning and Power Surges
Info
Top
Back
Openreach is responsible for any lightning damage to its network and overhead or underground cabling. It is not liable for any compensation or the repair/replacement costs for End User owned wiring or apparatus damaged by lightning.
If there is lightning damage to the external network, dropwire, aerial cable routes, poles or exchanges then Openreach will not charge for the replacement of the NTE or Master Socket. The NTE can be damaged as a result of inductive lightning; this is where a strike takes place within proximity of the Openreach Network causing an induced current surge damaging the NTE and / or End User Apparatus, but with no other signs of damage to the Network. There should still be NO charge for the NTE replacement.
Where there is damage to the End User owned wiring and/or apparatus with no damage to the Openreach network i.e. confirmation of a good test result with equipment unplugged, then a visit charge should be raised.
Where there is lightning and power surge damage to the End User owned wiring and Openreach has been authorised to carry out a repair then this work will be chargeable under TRC for time and materials. A visit charge will not be raised if the engineer is required carry out any repair to the Openreach network on the premises due to lightning damage on the same visit.

Computer zapped by power surge caused by lightning

My computer was zapped by a power surge caused by lightning, with my iTouch connected. I just got a new computer and installed iTunes. When I plug in my iTouch, nothing happens. No beeps, no lights, no battery indicator...nothing.
I've tried it on another computer. Same thing happens...nothing.
The iTouch seems to work ok with the content (movies and music) that is already on it, but I cannot get it to communicate with any computer.
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It strikes me as odd that the iPod still works but does not synchronise. I would have thought that with the nature of electronics today, that if a strike had affected it, then none of it would work -- guesswork of course. However, the cable does have those connectors at each end and one of those might have taken the force of the strike and thus saved the iPod from damage. Cheaper than a new iPod for sure if it is this.

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I was trying to boot up a live CD on my Toshiba Satellite P305D-S8900. The F12 key to pull up the boot menu didn't work, and it started to boot to Windows. I let it get past the "Starting Windows" Orab (running Windows 7), and hard-powered it off when it got to "Please Wait..." right before the login screen. After that, when ever I turn it on, the BIOS isn't loading. The Only LED lights going on are the Power button one, and the three that indicates it plugged in, the power is on, and the Battery indicator. The media buttons and the one above the trackpad doesn't work. The track pad one lights up when I hit the power button to turn it off. The fans are working (indicating the power management is working), the CD Drive is reading to see if there is a disc in there, and the screen remains black. There is no hard drive activity whatsoever. And the strangest thing of all...no beep code!!
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They sent a reply today:
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< Edited by Host >

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If you haven't found a solution for this yet, could you post the entire section of code? Please use the code tag to post the code.

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Think of it this way:
I open the bonnet of my car. I yank out a few pieces. My car won't start.
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Power hit causes lost previews

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