Dvr unit wont power on

https://www.youtube.com/watch?v=jq2kcQkpb6g

Watch this video to replace the starter.

It sounds like your timing belt may have failed due to the heat.

BATT CONNECTIONS

Is there a possibility you erred in reassembly and shorted a wire inside the unit which in turn blew a fuse in the car somewhere?

stock engine?
i did not decode that, at all.
has power? (what 12vdc power or engine power)
turn key it wont start but does it crank.??????? fast..
and lose power, what power is lost 12vdc power or engine runs but lost power?
the power is back what power? name something, specific,
like 12vdc power, starter power, engine power.
the starter wont work, i take that its silent?
or
starter spins but engine dont?
or starter clicks
or starter, is weak
or ???? try to be clear,

no engine stated.
no transmission.

if stick shift the clutch switch must work or the starter will be dead.
does that help
ever hot wire a starter, see this.
http://www.fixkick.com/nocrank.html

if engine will not crank, say that.
then say sounds. it makes if any.

That sounds like castrophic internal damage...

If it died and won't crank, sounds like you lost power to something.
Does the warning lights come on when you turn the key on ?
Got headlights ?
A mechanic would check for voltage at the starter and work back from there.

Sounds like a blown power steering line. To confirm, wipe down all surfaces around the power steering unit including the lines. Replace the power steering fluid and start the engine. While 1 person is inside the truck, have them turn the wheel from side to side while another watches the area around the power steering unit paying very close attention around the lines. The high pressure line is the most common cause for leaking fluid. If there's no crack or kink in the line, the issue may be the fitting itself where it connects to the power steering pump. Both parts are pricey but replacing the high pressure line (about $150 at the dealer) is certainly less expensive than replacing the whole power steering unit itself.

No spark, ck the crank position sensor. bolted on engine at the front crank pully. Good luck. unplug and plug it back in to clean the wire connection/