bizarre problem 16f628-20/P -?

[Archangel]

Thank's friend,
I was probe many trick's nothing want to work,simply I am confused....
Is some posibility to someone manufacture clone of PicMicro or something same ???
On first look it same signature like other on other PicMicro what I have in colection..
It is not important to me to I make it work and sale in some my hardware but it very interest for me to I find what is it why...etc.
I was probe to config it with internal osc at 4MHz and same problem too.
Now I go to get frquency meter and I will post if is osc activity on it ?!

Hi Phoenix,
I am having a little trouble with the use of the word "probe" As I understand this word, it is when you put the "test probe" of your meter on a voltage source or when your doctor pokes you looking for a tender spot, if you would please elaborate a little you would be helpful.
As to your code: Verify it is a 16F628 and not a 16F628A correct?
Now,

CMCON = 7          ' PortA = digital I/O

incorrect, cmcon = 7 ' turn off analog comparators

'when I put in same socket PIC 16F628-04/P and change XTAL to 4MHz and 2x27p LED
'blinky OK and if I change in that socket 16F84A-20/P and use XTAL 20MHz and 2x27p
'<font color=red>it blinky 100% OK. THAT MEAN THAT PROTO PCB is OK ........</font color>
'these code is for 16F628-20/P @20MHz HS osc

Proto boards are loss-ey, which is to say, using them is much like installing a bunch of unwanted capacitors, the connections are often poor. If you are using crystals instead of resonators, you might try reducing/not increasing the value as you go up in frequency, even try it without the caps (on the breadboard only), as I said before, the breadboard adds a bunch of extra capacitance to the circuit. Yes it is possible you got a hold of a counterfeit
PIC, although somewhat unlikely. Keep your wiring to the crystal very, very short. Anything attached to the crystal ports will load down the oscillator and keep it from working.