Avr transistor tester boot failed

[Kithsiri (Gast)]

Transister tester doesnt  boot power comesvto both display and 
microprocessor only when switch pressed movement remove the fingure 
power cutoff please help me totrouble shoot the problem

[Lothar M. (Firma: Titel) (lkmiller) (Moderator)]

A few hints:
1. those funny looking characters help the readers a lot: .,:;!?
2. did you have a look at your video before sending it?
3. add some information: did the tester run till yesterday and now ist 
faulty? Or did you build it and got this behaviour?
4. what supply do you use? did you measure the supply voltage at 
failure?

[Ei der Daus (Gast)]

Mir scheint der Finger zu nervös zu sein. Einmal NUR kurz betätigen 
reicht!
Der Schalter wird viel zu lange gedrückt! Der Tester wird o.k. sein.


Trotzdem wäre ein schärferes Video angebracht. Sorry, das mußte ich 
jetzt mal bemerken.

[Kithsiri (Gast)]

This just after build
Supply given by power supply it read as 8.6v if press long enough
I removed the display and processor both but stll power not delivered 
continuesly
even with 9v battery result is same

[Kithsiri (Gast)]

I am away from home will post good quality one in few hours

[Kithsiri (Gast)]

Here is the video clip to demonstrate the problem I have two circuits 
with same problem please help

[Hubert G. (hubertg)]

Leuchtet die rote Led auf? Im Video sieht man sie nicht.

[Kithsiri (Gast)]

No

[Hubert G. (hubertg)]

Die Led ist verdreht eingebaut oder defekt?

[Kithsiri (Gast)]

This is the circuit diagram hope this will help to find the cause

[Carl D. (jcw2)]

If the LED-polarity is wrong, the circuit wohnt work. It has TO shine, 
when Switch is pressed.

[Kithsiri (Gast)]

Thank you everybody who try to help me problem solved.
LED Polarity was reversed Carl Drexler specil thank to you for your kind 
instructions for trouble shooting