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Re: Ferm One electric screwdriver has no power
so what voltage did you see with the charger PLUGGED IN. ??
i asked that for a reason - i wanted to know if it was trying to charge.Comment
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Re: Ferm One electric screwdriver has no power
it was still 3.64 volts when the charger was plugged in.
Greenlight was flashing like it does when its charging.... but it didnt charge...Comment
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Re: Ferm One electric screwdriver has no power
then we are progressing.Comment
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Re: Ferm One electric screwdriver has no power
I just tested the motor, soldered the battery and motor off and connected them together, motor started rolling, so atleast motor is working
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Re: Ferm One electric screwdriver has no power
so it's around the charge/battery controller.Comment
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Re: Ferm One electric screwdriver has no power
replace the tp4056.
its not charging and the battery is below low voltage disconnect.or is the instant you pull the trigger.Comment
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Re: Ferm One electric screwdriver has no power
Ok, Is it hard to solder? its a very small piece...
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Re: Ferm One electric screwdriver has no power
need hot air.heatsink pad under chip.Comment
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Re: Ferm One electric screwdriver has no power
not so sure, in the foto it looks like they used thermal paste / glue instead of solder.
interesting method, i may try using it myself next time.
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Re: Ferm One electric screwdriver has no power
Check the output voltage of the charging IC. It should be 4.20V. If this voltage is present, but the battery voltage is 3.64V, then I would think that either M1 or M2 is not being switched on. ISTM that one is involved in charging, the other in driving the motor. The smaller chip probably controls the charging/operating modes.Comment
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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 all!
I'm trying to troubleshoot a Microsoft Surface Pro (5th gen) model 1796 that won't power on. Motherboard model is M1007506-015. My priority is retrieving data, but the SSD is integrated so it looks like if I can't repair it it'll need to go to a data recovery company. I've done a little basic board repair before, but nothing this advanced until now. So please forgive my ignorance in advance. 😅
I found the boardview for this laptop in the forums here, and am able to open it on my PC with FlexBV.
https://www.badcaps.net/forum/troubl...-hardware-devi... -
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... -
Hey, i have to repair an electronic board on an electric power stearing. the package was damaged during delivery and the connector was broken. but i can't find a part. the connector is the same BUT reversed as fiat power steering. I searched on digikey, mouser and aliexpress and i can't find any part similar. it's an uflex electric power steering, but i don't have more reference on the power steering block. if needed, i can buy any complete part just to recover the conector on the board and put it on this board...09-24-2025, 07:30 AM -
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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