2 weeks ago the power steering on my fiancee's 1.4 16v failed, but isn't showing any warning light. I had a quick scan online and then looked at it at the weekend and the fluid level was very low (below the dipstick) so I topped it up. It was reading almost perfectly in the middle and still is. Then when I tried to start it (the car had sat for a few days) I got the tick of a starter motor struggling. Another try soon after and there was nothing, the electrics entirely dead.
I read that power steering sometimes fails without a warning light when the battery is dying, so this lined up. Next week I got a new battery and the car sprang back to life with everything fine, except there's still no power steering (and no warning light).
I spoke to the local Skoda garage about getting a diagnostic - they're usually pretty helpful but they say I'll need to book it in and it'll be at least a couple of weeks.
Any ideas on what might be wrong? Could the battery failure be unrelated? I've started building a list of issues that can cause it to fail, but all the examples I've read about include various warning lights and I'm getting none.
Thanks.