Re: UE55D8000 Power Cycling On Off Issue
I have pm'd you back cheers
I have pm'd you back cheers
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Re: UE55D8000 Power Cycling On Off Issue
maybe these leds then
https://www.aliexpress.com/item/50PC...ceBeautifyAB=0Comment
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Re: UE55D8000 Power Cycling On Off Issue
Thanks. Yes I think these are the ones. Mike is going to do hia best for me. Such a godsend. I love this forum it's brillComment
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Re: UE55D8000 Power Cycling On Off Issue
Here's a spectrum image of the LEDs, the one on the left is the new LED and the right the old.
Photos of the new and old LED also.Attached FilesComment
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Re: UE55D8000 Power Cycling On Off Issue
Another update, I replaced both of the missing LEDS either end, then noticed the next two had small chips in the plastic in the top so those have been replaced also.
I'll test them all in the morning.Attached FilesComment
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Re: UE55D8000 Power Cycling On Off Issue
Brilliant Mike. Thanks that is brill
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Re: UE55D8000 Power Cycling On Off Issue
diff how are you replacing these ? I can't see a way to solder them to the pads... what am I missing ?Comment
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Re: UE55D8000 Power Cycling On Off Issue
You're welcome.
A photo attached of my setup.
I cleaned off the old solder before applying fresh with an iron.
Then stuck it on my hot plate. It's to see when the solder melts, then i placed the LED on top with tweezers.Attached FilesComment
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Re: UE55D8000 Power Cycling On Off Issue
That strip looks similar to mine it has a fairly beefy heatsink that the LEDs attach to. Tried heating with hot air wand underneath - no good. Tried using paste - not melting before the led does. Tried getting the tip of an iron just beneath the led at the pad - shitty iron couldn't supply enough heat before getting wicked away by the heatsink - better iron on the way
I'm not familiar with using a hot plate. Does the strip sit directly on it or is it advisable to have a small air gap ?Comment
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Re: UE55D8000 Power Cycling On Off Issue
It sits on it flush, it transfers the heat into the aluminium the LEDs are mounted on. There is a gap above as it was quickly thrown together for the photo and the strip isn't perfectly level.
The heatsink should remove from the strip.
The hotplate is set to about 240c, once it's got to temperature I then place the LED strip on it, I then watch through my microscope for the solder to melt then I place the LED on it.Comment
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Re: UE55D8000 Power Cycling On Off Issue
I guess the strip is mounted to the heatsink with screws ? If there is then there is a white plastic strip on the top covering them up...Comment
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Re: UE55D8000 Power Cycling On Off Issue
So was the issue caused by the LEDs? Is the TV working now?Comment
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Re: UE55D8000 Power Cycling On Off Issue
It was the leds. I sent them over to Mike but never heard back again so ended up selling the parts and dumping the tv at the recycling center.Comment
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This one's a weird one, and still unsolved despite it having gone back to Dell once.
Specs
i7-8750H, GTX 1060 Max Q, 500GB SSD & Seagate 7mm 1TB HDD. 17.3 IPS screen. This has the fingerprint reader in the power button.
Backstory
I bought this from eBay, from a wallpapering shop. £650 in 2020 which was a good price considering it's a gaming laptop. Physically it's in perfect shape, apart from the hinge mounts on the palmrest failing in the time I've had it (I have a new palmrest for it). The usual thin plastic crap modern build quality!...10-23-2023, 04:09 PM -
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... -
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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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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