When i m attempting to recovery my sony VPCEH3B4E it is showing that a necessaary file was not found and recovery media may be corrupted........and error 305.........it is coming at 24%of my recovery

SOURCE: VGN-FJ290 sony vaio

One of my clients' old Maxtor drives finally went South on her this weekend, just as I was in the middle of migrating her data over to her brand new computer. The drive just suddenly died- whir!, click!, spin down, vanished, kaput. I couldn't get it to spin up again on a few subsequent power-cyclings of the machine, and not wanting to damage either of her computers, I took it back to my shop to try to revive it. I put it in three different computers (running Windows and Linux), but it refused to engage in any of them at all; all I got from the drive were a few sick-sounding whines, and one of the controller chips began to get really hot.

I was just about to call her and give her the bad news when I remembered a really off-the-wall fix that I read about ages ago: wrap the drive in an anti-static bag, wrap that in couple of zip-lock baggies, and stick the beast in the freezer overnight. I Googled around a bit and found that this was considered to be a huge "Urban Legend" by many folks, but others said that the fix had indeed worked for them. 

WTF I thought- the drive can't be much more dead than it is now, right? Soooo... into the freezer she went (the drive, that is, not the client). Well, this morning I pulled the drive out of the fridge and stuck it back into one of my test boxes, and the damn thing spun right up, and stayed alive long enough to let me pull all of the data off to another drive! 

As weird as it sounded at first- it worked, so I just thought I'd pass my experience on in case it can pull anyone else out of a similar jam

SOURCE: Sony Vaio VGN-SZ460N - freezes on System Recovery

I put my money on that you have a CPU over temperature problem, and/or intermittent RAM problem.

Be sure you are ESD safe when working on the electronics as follow !

I suggest, using a eye piece magnifier and a wooden tooth pick and carefully touch each pin of your RAM sockets and see if the soldering is bad, allowing the pin to move slightly. If that happens, well it needs re-soldering there, make sure you use leaded solder, not the ROHS crapp.

If that turns out to be ok, then check your processor. It might over heat.
You may want to observe if the CPU fans runs at all and if it runs at full speed most the time, even if you don't run any 'heavy' programs. This usually would indicate poor heat dissipation. Most Sony Laptops have a piece of thermal foam pad is used for heat transfer from the CPU chip into the heat sink. Over time this pad shrinks, effectively impeding the heat transfer causing the CPU to over heat and intermittent shutdowns ect. I suggest, find a new piece of thermal pad or replace that with a piece of copper sheet material and use Thermalloy transfer paste.

SOURCE: Recovery DVD for Sony Vaio VGN-N130G

Contact Sony WEB site support, they can supply a recovery CD.

SOURCE: recovery error 320 on sony vaio laptop

Ketanvasu your an idiot....If he's trying to recover the laptop obviously the thing isn't working...so how the hell is he supposed to burn cd's genius?

SOURCE: Recovery Error 320

I had error 305: 69 when I tried to repair my sony vgn-ns160d using the recovery disc1. I called sony support and they told me that me hard drive was defective and needed to be replaced. they did not want to send me new recovery discs beause I was out of warranty. I copied the recovery disc at slow speed on another computer and tried rebooting the sony laptop with my fresh copy of the recovery disc. and it WORKED! it was not my HD that was defective it was their recovery disc! sonys support is non existent! trying to sell me a new hard drive!