2007 Prius won't start, but has interior power....

Hello everyone-I am new to PriusChat, so please excuse any errors I make.

I have a 2007 Prius that I obtained second (third) hand. I was on my honeymoon for 3 weeks, and when I got back my car would not start. It had some power--interior lights worked, key fob worked to lock/unlock doors, etc. After reading several posts, I tried jump starting my car-that did not work. Then I replaced the 12v battery (brand new optima yellow top)--still does not start. I checked all the fuses, they are fine. One note is that my dad did change my key fobs while I was away, but only the exterior case/batteries were changed--nothing in regards to the chip or anything was changed (I don't believe this is the issue, since the key fob will still unlock/lock the door remotely).

Currently (after replacing the battery), things that WORK:
----interior lights
----chime when the door is open and the key is in the slot
----headlights
----power locks
----horn
----key fob for locking/unlocking doors.

Things that DON'T WORK:
----ZERO dash light activity, as far as starting goes (it works because it tells me when the door is open)
----the light over the parking button DOES NOT turn on
----the light over the power button DOES NOT turn on

I'm at a loss, because all the other threads, people at least had some activity with the dash, were able to jump start, or had zero power. I'm trying to avoid going to the dealership, as I know the cost will be astronomical. If anyone has any suggestions for me to try, that would be great.

THANK YOU!

 

If he didn't, then how would it open the doors? He said he only changed the case (and battery) and kept everything else intact. I hope that's not the issue, since he threw away the old case.

 

So, the current key fobs I have DO unlock the doors remotely (ie I don't have to unlock manually)...

 

My dad said he replaced the outer case only. so everything internally is the same. I would imagine that the chip has to be in there/operating, otherwise anyone with a key fob with a decent battery could unlock my car... so, there has to be some sort of identifying information that ties the key fob to my car (which seems to be working while locking/unlocking my car)...

 

so, if he threw out the old case, what are my options at this point? go to the dealership? Can they even reprogram without the original?

 

Also, I don't think my car has SKS.. below the steering wheel, there is no button for it and I've always had to insert the key into the slot to start the car...does that make a difference (I'm guessing not, but thought I would check anyway)?

 

Thanks everyone! I called the dealership and, luckily, because my Prius is a 2nd Gen, they don't have to do a full ecu replacement job if I lost all my key fobs. Hopefully, they can use the key fobs I do have (which would save me $185). The quote I got from the dealership here was $124.95 to program the key and $90 to do the ECM Immobilizer Reset-so $214 plus tax (if I need a new key fob it would be a total of $400 plus tax). Not great, but much better than the $1,000+ I was originally thinking. So fingers crossed! My appointment is on Monday morning, so I will update everyone, in case this happens to anyone else.

 

Thanks JC91006. I only had one key and I guess he had the second one (I live about 3 hrs away). So he changed both of them, forgetting about the transponder (he used to be really good at stuff like this, but sometimes shit happens). Just an (expensive) mistake/inconvenience, but, I guess it could be worse. Thanks again for all your help-I miss the days of "easy" car fixes. I'll update once I'm done with the dealer on Monday.