Hi Alain, it's now getting hot in here !

I found another example on the net and pasted that into a new program that included my know LCD working code. The only switch activated on the board is SW9-7 for backlight.

Code:
temperature VAR	WORD			' Temperature storage
count_remain VAR BYTE			' Count remaining
count_per_c VAR	BYTE			' Count per degree C

DQ	VAR	PORTA.5			' One-wire data pin


' Define LCD registers and bits
;set PORTB as all output 

ANSEL  = 0                             
ANSELH = 0                                                 
DEFINE OSC 20            
DEFINE LCD_DREG PORTB
DEFINE LCD_DBIT 0
DEFINE LCD_RSREG PORTB
DEFINE LCD_RSBIT 4
DEFINE LCD_EREG PORTB
DEFINE LCD_EBIT 5
DEFINE LCD_BITS 4
DEFINE LCD_LINES 2
DEFINE LCD_COMMANDUS 1000
DEFINE LCD_DATAUS 100

ADCON1 = 7			' Set PORTA and PORTE to digital



mainloop: OWOut DQ, 1, [$CC, $44]       ' Start temperature conversion

waitloop: OWIn DQ, 4, [count_remain]	' Check for still busy converting
	IF count_remain = 0 Then waitloop

	OWOut DQ, 1, [$CC, $BE]		' Read the temperature
        OWIn DQ, 0, [temperature.LOWBYTE, temperature.HIGHBYTE, Skip 4, count_remain, count_per_c]

	' Calculate temperature in degrees C to 2 decimal places (not valid for negative temperature)
	temperature = (((temperature >> 1) * 100) - 25) + (((count_per_c - count_remain) * 100) / count_per_c)
	LCDOut $fe, 1, DEC (temperature / 100), ".", DEC2 temperature, " C"

	' Calculate temperature in degrees F to 2 decimal places (not valid for negative temperature)
	temperature = (temperature */ 461) + 3200
	LCDOut $fe, $c0, DEC (temperature / 100), ".", DEC2 temperature, " F"

        Pause 1000                      ' Display about once a second

	GoTo mainloop			' Do it forever
The display now reads:
654.11 C
554.54 F

I'm just wondering if the DS device is faulty ?

I'll give your revised code a try later - I need a break !