Hi have sony vaio e series .When attach power adapter fan start and power light on the bottom .And thats all, power switch no lights and when pressed button nothing happens ,the motherboard is mbx269 any suggestion is appreciate .Im not expert but can read voltage and if anyone can point me where to start thx
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Re: Sony vaio power problem
Hi
If you have ALWON voltage 3/5 with just adapter plugged in with out press power button ..the i would start with reflashing bios ...you will need a programmer and pull the SPI 8 PIN CHIP to do so back up original file then reflash it with mine...if it start i will rebuild the ME REGION for you is a must. plug adapter in a probe around all them big square coils only two of them will have power with just adapter in ...if not start with ALWON voltage two main mosfets h-l and buck controller.
Techman1025 -
Re: Sony vaio power problem
Hi thx for replay I was change bios chip from another motherboard same one mbx269 and still same,I check the power on bios chip and reading is very low like no power at all .Can u point me where to start to check voltage and which mofset you mentioned in previous post thx
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Last edited by ciki; 12-25-2014, 07:33 AM.Comment
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Re: Sony vaio power problem
trace that 3.3v on that biosComment
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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)... -
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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...
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