Hit and killed the cow and its considered as minor accident? I heard there are people who hit a cow and the car total lost and some  drivers died of injuries.

Any photos?

What's the speed when u hit the cow? Kampung roads isit?

Ya you are lucky cuz u bought a good car LOL.

wow, persona front also as tough as volvo 240?

Maybe fuse burnt. Try check the fuse box, located under steering and look for dash board fuse and check the fuse condition.

Do u encounter any other lighting not functioning ? Like reverse light, number plate lighting ? If yes, then it is easy for u to look for the correct fuse. Normally dashboard lighting fuse are joint with other lighting.
Unplug the fuse and look inside the metal thing, if broken mean this fuse already burnt.
Go to any sparepart shop. It only cost tiny cents per pcs.
If u cant find it, better ask foreman to chk for u.

your description more like intermittent wiring or electronic short, not as simple as fuse blown as that would be permanent effect until you replace the fuse.
usually foreman won't touch the wiring stuff, they will recommend you to wiring guy. bear in mind some "big group" of accessories shop also not familiar of car wiring, just simply tap wiring point. Last time my father's car screen for reverse camera no power after rear accident repair, the accident repair workshop just sent to big accessories shop and the technician took more than 30 mins to tap to a permanent power source, once start car the screen will always displaying unless i off it my self, their sifu lied to me reverse camera screen is like that one, need permanent on de (wtf, luckily workshop gaodim the fee so i no need pay). Later i send back to the place i installed the reverse camera, the technician just done in less than 10 mins.

where is your location? I can intro you an old uncle wiring man. last time i tried his service on audi, but i think should have no problem dealing with simple wiring on persona gua.

now what problem you have? meter panel lighting resume normal right? only signals cannot use?

i would advise you get it repair before long outstation trip lor. 1st is safety concern as the usage of signal light, 2nd is you don't know what's wrong with it, gila gila meter panel readings reset before, no lights etc. get it fixed to have peace of mind before long journey.