" "I have seen a manual I which it said that dc issue, do anyone know how to disable the power on fault checking" You cannot do this. Protection can only be kicked out when no dc is coming out from speaker terminals. This holds no mater whether differential and voltage amp are defected (leakage) or protect detection SMD transistor(s) is/are leaked. They act as a switch. Download X2100W service manual and enter debug mode to check if DC or ASO(over-current protect ) makes protect.
SOURCE: Sony KDL-40S20L1 Flashing Standby Led, No pic, No Sound
Hi, If all else fails, try do a hard reset. You can verify from your manual, but in some units, this is merely unplugging the unit from mains for a couple of hours. Try again, if it still shows error codes (blinking lights) you probably have to seek the services of a qualified professional. Hope this be of some help/idea. Good luck and kind regards.
SOURCE: Disabling Bios Writing Protection
Sometimes the BIOS calls this protection some sort of "virus protection" as past viruses, like the CIH virus would tend to overwrite motherboard BIOS' with jargon, bricking the motherboard. Try disabling any onboard "virus" protection and try flashing your BIOS again.
Hi David
I think you should replace the lamp.
SOURCE: Shutdown protection? HELP please
All of the Denon recievers I have repaired (over 100) that shut down after a very short time are going into protect mode. The display lights up and after about 10 seconds the display goes out and the standby led blinks red.
I have found that they have one of 3 possible problems and they all require that the reciever be taken apart and fixed at component level. No way to tell what your problem is until it gets put on a bench and troubleshot.
Problem 1. This is the most common problem. One of the front channels shorts out. On the big heat sink the front channels are at each end. It is the front left channel (close to the display) This requires that the output transistors be replaced as well as some driver transistors and some resistors and a capacitor. Lots of work for a blown channel. Denon has put out a bullitin to upgrade the bias transistor and change a couple of resistors to help compensate for this failure. That channel overheats more than any other channel.
Problem 2. There is a resistor that is right next to the preamp board that opens up. It is a 10 ohm 1 watt resistor and when it opens, it causes the unit to go into protect.
Problem 3. The +12 volt regulator fails. It is in the power supply area on a smal heat sink right next to the -12 volt regulator. Generic part number is KIA7812 It also causes the unit to go into protect.
Most decent repair shops can fix these from about $120 up to about $200. Depending on which problem it is and how fast they are at finding the problem. Most charge labor by the hour.
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