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now i'm trying to install macos on a usb, and see if, removing the original ssd, in smc bypass it can booot the usbComment
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What was the result of the shorting the on/off button pads on the logic board? (post #36)Comment
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A lot of ideas were shared but not followed. You have many parts of this unit working.Comment
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i couldn't try because of dead battery.
now i have installed a good battery and discovered something.
if i insert the cable, the fan start after some second and spins for 10/15 second. and i can clearly hear chargin sound.
with battery installed, i can't go in smc bypass.
with good battery and charger connected AT THE SAME TIME, ALL VOLTAGES ARE STABLE!
trackpad doesn't click and i have no caps lock led
i've tried to power it on with battery only pushing power button or make a jumper between smc_onoff_r_l and gnd with no luckLast edited by phantomEVO; 03-23-2025, 12:45 PM.Comment
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changed isl9239! now macbook can boot with battery only pressing power button, but i have fake charging (sound, charging symbol but it can't charge)
can't boot anymore with power supply only
ppbus_g3h is 0v when only power supply is connected
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What chips are used by the power adapter?
Review them for defects.Comment
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ok fixed with another isl9239...now it charge with both ports
but i still have some problems.
some times (not always) macbook doesn't start with battery only, if i connect the power supply too, i have charging sound, fans spins some seconds then stop ad nothing happen.
with cable only, it boots always.
other problems:
one port charge but not read usb drive (status led of usb doesn't blink at all). this port is near the screen....maybe it's beause of that, that i can boot since the beginning, with one port only! (the port near the trackpad)
another problem is this
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ok, changing u3200 now i can read usb drive.
i have a lot of problem to use external monitor throug usb c adapter...but it is not a foundamental problem at the moment.
i don't understand why i cant boot with battery only or power supply + battery...i will tra another battery flat...just in case...
and i have also a big column darker then the rest of the screenComment
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Hello all... TV started boot looping. Opened the back panel and tried to isolate the problem. Just PSB no boot loop. PSB and MB no boot loop. Plug in the LVDS from panel to MB and boot looping starts up. It doesnt matter of order that I plug the LVDS ribbons back in, only 1 and no boot loop but as soon as 2nd one plugs in boot looping. I then noticed a flicker on the screen when I was closing the clip on the harness to the LVDS. Shut the lights off so I can see better, and I noticed as i slowly close it, I will get a picture, but as soon as it clips in, I lose picture and booting happens. So I... -
Samsung QLED QN50Q — purchased 2022 started experiencing a delay in the picture coming on in the morning less than 2 years later. Did not know the term boot loop at that time. As the loop delay ran into a few minutes did all the recommended troubleshooting, soft and hard reset, changing cables and outlet locations, no help. As the delay increased contacted Samsung tech group and allow them remote access the tv. Tech was moving too fast to see exactly what he was doing but this ultimately it was also no help. Lived with the delay until it stretched out over 6 hours. Pulled of off the back cover... -
Less than a year out of warranty, samsung UE49MU6105K craps out, they've got this designed obsolescence down to an exact science of self destruct when out of warranty...
Screen started to show horizontal lines and ghosted image at the bottom, then turned off by itself. Did software update, to no avail of the line problem, and got a boot loop after some minutes of watching TV. This boot loop will turn on the backlights for some seconds the sound comes on, the image will turn dark very fast and then it reboots again. Pressing power button will not put it on standby. Disconnecting... -
Hi Team - just joined to see if anyone can offer some expertise in diagnosing an issue with a TV.
I've done a few hours googling and youtubing but just seeing if anyone has any insight here. I got a 55" Samsung UE55MU6470U which seems to boot loop and then after 10 mins will boot, work for a few minutes, then turn off and repeat.
Whilst it's on into the normal Samsung menu/boot screen it looks perfect - so I can't see there being any screen issues. I've seen lots of videos with taping across clock lines to diagnose which particular one may be an issue but i don't... -
Hey everyone,
Usually, I'm not the type to ask for help, but this time, I'm calling on your wisdom and expertise
I've seen what this community can do, so I'm pretty sure you guys can help me out.
Here's the deal: I noticed my MacBook got stuck in a boot loop. After opening it up and doing some initial troubleshooting, I found that the boot loop stops only when the trackpad is unplugged.
Now, just so you know, the trackpad actually works — I tested it with another motherboard and it's all good. Same for the cable, no issues there. The problem is only...
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