I was trying to repair my tv wich previously had a blinking red led 2 times and it kept going. After shorting the sdm the blinking led changed 5 slow blinks and 3 fast ones wich in the service manual meant error 53 / the fusion chip.
After I heated the fusion chip with a hairdryer for 5 minutes it started working perfectly but after a day it stopped this time no led blinks even in sdm mode.
After probing the psu I have 3.49v and for 1 second I have at least 2 12.3v lines active the fusion chip gets warm in that second the led turns on and then the 12v lines start losing power...

Hi everyone,

I’m working on a Denon AVR-X4000 that goes into protection mode (fast red blinking LED) shortly after the second relay click.

According to the service manual, a fast red blinking LED indicates a DC detection (DC_DET) or ASO (abnormal current) fault, meaning the unit is detecting a potentially dangerous condition on the power amp or power supply side.

Here’s what I’ve done so far:

• Fully opened and cleaned the unit (a lot of dust inside)
• Removed and visually inspected the AMP board → nothing visibly damaged or burned
• Testing is done with

...

I have a Sony Bravia KDL-40V2500 that will not power on. The indicator flashes red 3 times.
I do not hear any sound and I cannot see any backlight.
I have tried disconnecting every cable on each board one at a time to see if anything changes.
The only change is when I disconnect AC-DET cable on the Power Supply board or on the other end if I unplug the CN7009 connection on the B-Board and try to power on the TV the indicator will stay on solid green until I power off.
My friend ordered another used power supply board but it is also doing the red indicator flash 3 times...

Howdy everyone! I hope all is well where ever you are!

I'm attempting to integrate a couple of LED pods into an automotive reverse lamp circuit. The problem being, while the vehicle is running there is a 8.5v current present on the reverse lamp power wire. Needless to say is that all LED pods and lights dimly illuminate while the 8.5v is present, so the LEDs are always powered on while the vehicle is running. When the vehicle is shifted into reverse, the voltage changes to 12 volts.

I am uncertain how to convert this line into a switched 12v output line for the LED pods....