when the power is turned on, there is a click and then it goes into standby and the power LED keeps flashing red. Any thoughts?
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Re: Denon AVR 2106 power problem
Maybe bad final transistors. -
Re: Denon AVR 2106 power problem
Found the +15 volt line was 0V. The 15V is controlled by the LM7815 regulator. Ordered the part from Digikey.Comment
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Re: Denon AVR 2106 power problem
No 15 volts is indeed a problem. Regulators can fail, but 3 terminal VR's have a current foldback feature that prevents most problems from smoking it. You might measure the resistance to ground on the 15 volt line to find some other problems. The flashing red light is usually morse code for d.c. at the speaker terminals. (protect mode). Let us know what happens with the new regulator.Is it plugged in?Comment
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Re: Denon AVR 2106 power problem
replaced the +15v regulator and problem solved.Comment
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I have an LG Plasma TV 60PM6700 for the past ~12 years.
In the last ~3-4 months I have been having some issues.- Problem: It started with random picture disappearing (sound still worked).
Frequency: Happened about once a week.
Solution: Had to turn off TV wait a few seconds before turning it on again. - Problem: Then it got worse and the TV started to shut down and when turning on the no picture just sound.
Frequency: Happened about once a week.
Solution: Had to turn off TV wait about 10-20 seconds and turn it on again to solve. - Problem: TV shuts down
- Problem: It started with random picture disappearing (sound still worked).
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When I reflash again the bios of hoaca388 the unit powers on and the unit lives!!! Hooray!! All voltage in the coil 3.3v, 5v and 6.7v indicate charging are all present. including the cpu voltage , EEPROM and GPU voltage the unit is now alive, normal screen booting to windows and log in screen until I power it off. Then the unit never goes on even when pressing the power button in the keyboard.. Voltage reading 19v main , 3.3v VCC in IT8225E-128 and EEPROM VCC 0 volt and the charging voltage 0 volt.
Try to trace the power switch button goin to the power switch IC PU8803 (APL3533AQBI-TRG)... -
Hello, trying to fix C9 55 inch. I have pulled the back and all looks completely normal with nothing burnt so far. This is first time attempting to fix a tv so any help is appreciated.
Problem. I hit power button, red light on TV turns off and tries to turn on, no picture shows up and then shuts off. This occurred after house power turned on and off, not from a storm.
I have tested the power going from power supply to main board, all 12v and 20 volt readings are proper when I hit power button.
The power supply to t con is different story.
This... -
I have a lenovo ideapad 5 14itl05, board LA-K321P, That will only power up on Battery only, or with battery disconnected and power adapter only. If battery is connected and usb-c power plug connected. It only works on battery and will not charge. I can however force it to charge by connecting the battery from a disconnected state while the power USB c plug is powering the laptop.
Additionally....to add to this strange situation. The usb-c power plug ONLY works to power the laptop on one side when inserted into the boards power usb c plug. If you rotate it 180 degrees, the board gets... -
I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump
One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy...
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