Going backwards, can't even get a basic blinky working now

[Demon]

Started trying to get USART going on the LAB X1, but was getting garbage - couldn't figure it out, so I moved to a breadboard and started at the beginning. It doesn't get much more basic than this on a 16F877; blinky on pin D1.

#CONFIG
    __config _HS_OSC & _WDT_OFF & _WRT_OFF & _BODEN_ON & _LVP_OFF  & _CPD_OFF & _PWRTE_OFF & _DEBUG_OFF
#ENDCONFIG

DEFINE  OSC     20

ADCON1 = 7              ' A/D off, all digital
TRISD = %00000000
PORTD = %00000000

START:  PORTD = %00000000
        PAUSE   500      
        PORTD = %00000010
        PAUSE   500      

        GOTO    START
Finish: end

Compiled using PK4 successfully:

DFP Version Used : PIC16Fxxx_DFP,1.4.149,Microchip
*****************************************************

Connecting to MPLAB PICkit 4
Currently loaded versions:
Application version...........00.09.46
Boot version..................01.00.00
Script version................00.05.58
Script build number...........abbfe90327
Tool pack version ............1.15.1688
Target voltage detected
Target device PIC16F877 found.
Device Revision Id  = 0x6
Device Id = 0x9a0
*****************************************************
Erasing...
Erase successful
*****************************************************
Erasing...
The following memory area(s) will be programmed:
program memory: start address = 0x0, end address = 0x1fff
EEData memory
Programming/Verify complete
 Program Report
01-May-2023, 17:01:53
Device Type:PIC16F877
Program Succeeded.
PK4 Verify Report
01-May-2023, 17:01:53
Device Type:PIC16F877
*****************************************************
The following memory area(s) will be verified:
program memory: start address = 0x0, end address = 0x1fff
EEData memory
Verification successful.
Verify Succeeded.

• I added two power LEDs at the top to show both rails are powered.
  
  Blinky LED is on pin D1, and yet nothing happens.
  
  LED comes on if I manually apply 5V to pin.
  
  I've changed 20MHz OSC and caps.
  
  Changed MCU.

I've been trying to figure this out for waaaay too long now, I feel I'm getting dumber by the minute.

Robert




EDIT: For a sec I thought my CONFIG was obsolete, but that looks ok.