HP L1740 Service Manual

17" LCD Color Monitor HP L1740
31
2. W/LED No Backlight
Check C820 (+)/C840 (+) =12V
NG
OK
Check C820/C840
Check ON/OFF signal
Check Interface board
NG
OK
Check U811 pin1=5V ?
NG
OK
Change Q821 or Q841
Check the pin1 of U811 have saw tooth wave
NG
OK
Change U811
Check D833、D853 has the output of square wave at short time.
NG
OK
CheckQ821/Q841
Check the resonant wave of pin2 & pin5 for PT801/PT802
NG
Check the output of PT801/PT802
Check Q821/Q841/D833/D853
Check connecter & lamp
OK
NG
Change PT801/PT802
OK

HP L1740 Specifications

General

3D	No
Response time	8 ms
Display diagonal	17 \
Display resolution	1280 x 1024 pixels
Viewing angle, vertical	135 °
Contrast ratio (dynamic)	-
Contrast ratio (typical)	500:1
Display number of colors	16.78 million colors
Viewing angle, horizontal	150 °
Digital vertical frequency	56 - 76 Hz
Digital horizontal frequency	30 - 83 kHz
Display brightness (typical)	300 cd/m²
Supported graphics resolutions	720 x 400, 832 x 624, 1152 x 870, 1024 x 768 (XGA), 1360 x 768 (WXGA), 640 x 480 (VGA), 800 x 600 (SVGA)
USB hub version	2.0
DVI-I ports quantity	0
Cable lock slot type	Kensington
Panel mounting interface	100 x 100 mm
Power consumption (max)	60 W
Power consumption (average)	33 W
Power consumption (standby)	2 W
Power consumption (typical)	40 W
Product color	Black, White
Country of origin	China
Package weight	8800 g
Sustainability certificates	ENERGY STAR

Weight and Dimensions

Depth (with stand)	248 mm
Height (with stand)	490 mm
Weight (with stand)	7000 g
Depth (without stand)	62 mm
Width (without stand)	371 mm
Height (without stand)	315 mm
Weight (without stand)	3760 g