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"When LEDs are on(lit) they mean:
HD 3870 LEDs
R53 Green Led Off - shows critical temperature fault
MR53 Red Led On - shows External power connector was removed
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HD 4850 LEDs
D1601 - Over temp protection enabled
D1602 - EXT 12V fault
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HD 4870 LEDs
D1601 - Red LED On, shows critical temperature fault
D1602 - Red LED On, shows External power connector A was removed
D1603 - Red LED On, shows External power connector B was removed
D601 - Red LED On, shows critical Core power fault
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HD 4870X2 LEDs
D14 (R753) 6 Pin power unplugged
D13 (R724) 8 Pin power unplugged
D15 (R819) Overheating (Thermal issue)
D5 (R323) GPU-1 (Master) No power
D7 (R570) GPU-2 (Slave) No power
At BOOT/POST, the card's fan will spin @ 100% for a short while, the LEDs will light up for a brief period and then go out. This is NORMAL behaviour as the card is performing it's own type of POST test.
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HD 4850X2 LEDs
D1601 : ASIC CTF Enable (GPU overheat protection)
D29 : 8 pin external connector no power
D30 : 6 pin external connector no power
D25 : Boot up fault LED (Re-plug the VGA board or D1601,D29,D30 all failed)
D1250~D1252 : Turn on with normal behavior in the left ASIC
D1253~D1255 : Turn on with normal behavior in the right ASIC
At BOOT/POST, the card's fan will spin @ 100% for a short while, the LEDs will light up for a brief period and then go out. This is NORMAL behaviour as the card is performing it's own type of POST test.
Green LEDs lit mean the VGA card is working normally. A RED LED will show on D1250~D1252 / D1253~D1255 to show normal operation.
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HD 3870x2 LEDs
D25 : ASIC Thermal fail / Overheat
D32 : VDDC_G1 power fail / Master ASIC VDDC fail
D34 : VDDC_G2 power fail / Slave ASIC VDDC fail
D28 : External A power fail / 8 pin External power fail
D31 : External B power fail / 6 pin External power fail
At BOOT/POST, the card's fan will spin @ 100% for a short while, the LEDs will light up for a brief period and then go out. This is NORMAL behaviour as the card is performing it's own type of POST test.
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HD 4890 LEDs
D601: VDDC_FAULT
D1601: critical temperature fault
D1602: AUX Hot Plug/Unplug Fault (upper connector)
D1603: AUX Hot Plug/Unplug Fault (lower connector)
At BOOT/POST, the card's fan will spin @ 100% for a short while and 3 of the 4 LEDs will light up for a brief period and then go out ( D601 should remain unlit ). This is NORMAL behavior as the card is performing it's own type of POST test.
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I will continue to update this with more information. Not only will it be on the LEDs, but I will also update with other helpful information for diagnosing problems (might come as different threads, depending on topic)."
men i denna tråd så är det moderkortet: New build 'no signal' (4850 red LED's flashing) help needed - techPowerUp! Forums
