I have an Alba tv which sometimes comes off stand by and I have a picture but often than not the stand by light flashes and stays on stand by. I have changed the capacitors but no change. I have checked the diodes and all seem to be ok. Any advice would be greatly appreciated. John
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Re: Alba tv lcd32880hdf - power PCb issue
whats the power board number. -
Re: Alba tv lcd32880hdf - power PCb issue
Probably badcaps being a vestel chassis, replace the rest of the caps on the psu.Last edited by ReeceyBurger123; 03-21-2015, 07:14 AM.Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !
https://www.facebook.com/Telford-Tel...7894576335359/Comment
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Re: Alba tv lcd32880hdf - power PCb issue
17pw26-3 v1. I have purchased another power board on eBay but it's a version 4. The only noticeable difference between the boards is a 1000uF 35v capacitor on v1 and a 50v on the v4 board. I'm picking that board up next week.Comment
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Re: Alba tv lcd32880hdf - power PCb issue
Update to tv problem. I plug in the tv the stand by light comes on then blinks a few times before a picture is shown or nothing happens and the stand by light stays off but no picture.Comment
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Re: Alba tv lcd32880hdf - power PCb issue
Edit to previous post. I plug the tv in. Stand by light comes on, blinks a few times, stays off and no picture. Sometimes a picture is displayed but not very often.Comment
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Re: Alba tv lcd32880hdf - power PCb issue
Is the Backlight coming on when the picture isnt?TELEFIX
How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
http://www.irf.com/technical-info/appnotes/an-1088.pdf
PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!Comment
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Re: Alba tv lcd32880hdf - power PCb issue
Can you test the voltages in the non working condition and working condition (if you can get it to turn on) this scheme may help
[SCH].pdf&mfg=OEM
what colour is the standby led flashing? red red/blue etcComment
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Re: Alba tv lcd32880hdf - power PCb issue
fixed link:
Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Alba tv lcd32880hdf - power PCb issue
cheers tom it was working when i copy and padted it from another post of yours not sure what went wrong.Comment
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Re: Alba tv lcd32880hdf - power PCb issue
I think some browsers don't like the "]" in the URL even though it's urlencoded. What browser did you use?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Alba tv lcd32880hdf - power PCb issue
It's a whie led and it flashes then remains off. The blue screen came on now and again but not at all.Comment
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Re: Alba tv lcd32880hdf - power PCb issue
Consider replacing C878 - I've heard it can be troublesome on these models.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Alba tv lcd32880hdf - power PCb issue
Thanks for the advice tom66 and vinceroger69. Much appreciated.Comment
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Re: Alba tv lcd32880hdf - power PCb issue
Backlight not coming on at all nowComment
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Hi all,
TL;DR - this laptop is driving me nuts with the oddball power-related behaviors. Appreciate any insight you can provide!
I'm experiencing a power issue on an Asus Probook P5440UF-XB74. Although I've worked with electronics and computers for decades, this is my first attempt at getting into motherboard-level component troubleshooting. Any help the community can provide is greatly appreciated!
A few weeks ago I was using the laptop (on battery power) for a Zoom meeting. The battery was running very low (long meeting) but I wasn't worried about... -
I am seeking guidance on an Acer Spin 1 SP111-33 that does not turn on when pressing the power button.
Below are the observations and troubleshooting steps I have taken so far: Observations and Tests:- Verified that all critical voltages are present:
- 3.3V and 5V are always present if DC is plugged.
- 1.8V on the BIOS chip is present.
- Checked the power button functionality:
- When pressed, the voltage drops to 0V, indicating the button is functional.
- Inspected the flex cable connecting the USB, audio, and power button to JUB1:
- Confirmed connectivity is intact, ruling out issues
11-26-2024, 12:39 AM - Verified that all critical voltages are present:
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
hi guys, my motherboard will not start no matter what
when connected to ac power, the battery does get charge, led indicator glows red when discharged and turns white as it is fully charged.
but rest nothing happens no sign of life.
this laptop has one preexisting usbc power issue - so i use DCIN jack for charging my laptop.
with this issue my laptop was unable to power ON only sometimes i just had to wait some time.
but now nothing happens no matter how much i wait/ charge/ press and hold power button.
i have no knowledge of motherboards ....10-20-2024, 02:48 PM -
Dell laptop (E7440, uses the notorious CD3301B power controller + MEC5075 EC + BQ24715 charger IC)
Symptoms:- Laptop works normally on a pre-charged battery.
- Battery does not charge when adapter is connected.
- Without battery:
- Laptop powers on from DC adapter, passes CPU/RAM init checks, then cuts DC power abruptly.(seems to shutdown one of the mosfets in the charger path). Then the loop continues indefinitely
- Speakers “pop” when power cut occurs indicating harsh sutdown.
- If RAM is removed, the system shows RAM missing blink error code indefinitely without cutting DC power
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