Questions tagged [damage]

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16 votes
4 answers
4k views

I ripped the lead off this film capacitor by mistake - is it beyond repair?

As the title says, I accidentally ripped the lead off this film capacitor. It was the only one I had - am I out of luck, or can this be soldered back on? I've provided photos, including one under my ...
25 votes
8 answers
4k views

Stopping electric arcs between layers in PCB - big PCB burn

Firstly, let me preface this with the fact that I am not interested in chastising the user, and I am not interested in looking at the original source of the arc (it was a tool accidentally breaching ...
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1 vote
0 answers
63 views

Can an LCD be damaged by a low battery voltage?

I've got a digital alarm clock where the battery got really low, to the point where the display was hardly viewable. I assume that the voltage must have really dropped. I put some new batteries in it, ...
2 votes
2 answers
94 views

Is it possible to replace 50N06 chip? [closed]

Problem: I've got an LED light bar that has started blinking on half of it. I disassembled it and found an apparently damaged area on the PCB inside. Question: What is this chip? Would I have any hope ...
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9 votes
2 answers
2k views

What was this completely destroyed piece?

Yesterday morning, I was preparing my tiller pilot (auto pilot for small boats) but it sounded like something was loose inside. When I opened it up, I found a damaged rubber sealing and the piece in ...
  • 407
4 votes
0 answers
126 views

Can chips be sensitive to mechanical stress after an electrical incident?

Is it possible to electrically damage a microcontroller (or any chip) in such a way that it becomes very sensitive to mechanical stress? Some background: We are developing a board with 7 identical ...
  • 26.6k
-1 votes
1 answer
90 views

Help identifying silver oval capacitor

[Edited to stay on topic] My induction hob recently went 'pop'. I believe I have a blown capacitor. "C24" on the main board. It is showing subtle 'bubbling' at the end. My issue is that I ...
0 votes
1 answer
459 views

why did my powered usb hub kill my computer's usb port? [closed]

Curiosity kill the computer port. But why? I bought a 4 port USB 2.0 hub. I removed Vcc and Gnd from the Type A connector of the hub. Then I powered the hub and inserted a USB stick into one of the ...
0 votes
0 answers
96 views

Higher PWM frequency than rated for device

I've an electronic speed controller (ESC) rated for a maximum PWM frequency of 48kHz. As I was working on a project I was generating PWM. This PWM signal was connected to the ESC. After I noticed that ...
3 votes
2 answers
257 views

BJT collector power limit in pulsed usage?

Assuming that my circuit respects the voltage, current, and thermal limits of a BJT, can the device be electrically damaged by exceeding an instantaneous collector power limit? In other words, are BJT ...
0 votes
1 answer
72 views

Is a damaged charging cable safe to use? [closed]

I have a M1 Macbook Pro 2021, 14". The charger that comes with this device is the 67W adapter and a USB-C to MagSafe3 adapter. Unfortunately, today I didn't see the charger on the ground and hit ...
1 vote
1 answer
84 views

LED Dimmer circuit accidentally damaged

I am currently working on a prototype system that uses these 3w LED drivers (I am using the one with the picture at the right). It uses the XL4001E1 CC DC-DC converter capable of outputting 700mA to ...
1 vote
1 answer
143 views

AMD 5600x microprocessor substrate damage

I hope this question lies within the guidelines. I have acquired this AMD 5600x microprocessor for a very low price. It was dropped on the corner (see picture) where we can see some delamination. The ...
  • 440
2 votes
0 answers
167 views

I2C communication pin and/or device getting damaged

I have a Raspberry Pi communicating with some I2C client devices. Occasionally either the I2C client device fails or a Raspberry Pi pin (one of the I2C pins) is damaged. The only thing I can conceive ...
  • 151
0 votes
2 answers
148 views

What kind of component is this, and is it damaged?

My central heating controller stopped working. It's essentially an AA battery powered device with a thermistor, some buttons, and an LCD screen, which lets me program desired temperatures for various ...
  • 103
2 votes
3 answers
118 views

I have some salvaged PNP transistors, should they conduct forwards past a particular voltage or are they damaged?

I have salvaged two A1490 transistors from an old amplifier. Both of them, if presented with a potential difference across the collector and emitter above about 13.5 V start conducting, even if there ...
  • 487
1 vote
1 answer
208 views

Why does broken monitor have vertical lines [closed]

I unfortunately dropped a pointy object and it pierced a tiny area of my monitor (AOC U32E2N). I was surprised to see that the whole area of the impact (where physical damage can be seen) is ...
1 vote
1 answer
153 views

What’s the likely cause of ‘buzzing’ from this hi-fi speaker? [closed]

Something has happened to one of the drivers in my speaker and it’s now ‘buzzing’. (Our cleaners could have knocked the speaker over). There’s no obvious (to me) signs of damage having examined the ...
-1 votes
1 answer
76 views

Is there a chance that a DC/DC controller was damaged when a bad feedback network caused its output to exceed its absolute max limit?

I'm currently debugging an issue with a DC/DC controller. The part is a LTC3833. It turns out that the engineer who was working on this accidentally pointed to incorrect part numbers for the passive ...
0 votes
0 answers
163 views

Is it possible to damage a PCB by plugging an USB 5-pin header the wrong way?

I am using a Cliff CP30100 dual USB socket to easily switch between two PCBs (see wiring diagrams). On the inside, there is an USB-C to 5-pin cable for one PCB, and a Mini USB to 5-pin for the other. ...
1 vote
2 answers
143 views

Which components tend to damage first of a power supply for high voltage?

Which components tend to damage first of a power supply for a voltage spike or surge?
  • 19
0 votes
1 answer
87 views

What is the name and function of these components?

Following are two pictures of a smartphone's main board (Moto G8 Plus). The first one is for reference; the second one is the one I got to repair a phone. Questions What are the golden sheet (...
  • 3
0 votes
0 answers
30 views

Implications and cause for static discharge

For months, I've had a potential buildup culminating in static discharge when touching the chassis of my macbook pro at ONE location. No source could be identified (no ground leakage – I checked with ...
  • 1
0 votes
0 answers
53 views

Can I use an Apple charge Cube (5W power) through a Ripcord 9V to USB to feed a Roland SP 404 (2.7 W draw) Safely?

I am asking this as I want to be extra sure this setup does not damage my 404 Sampler as its an expensive item of mine and it's very dear to me so I want to be careful. Here is the scenario: I have ...
2 votes
2 answers
196 views

Expected behavior for damaged transistor

The generic question I have is what's the "expected" behavior for a damaged BJT. Let me add more color.. I was trying to fix my kid's toy where a motor would run even when it wasn't supposed ...
  • 123
1 vote
0 answers
55 views

What check can Ι perform to verify that a load cell is operating properly?

About five years ago I was tasked to develop the software for a small custom made testing machine (everything is custom-made from frame, to the measuring system). Last year, I was volunteered to &...
  • 111
1 vote
0 answers
53 views

PCBA failure - white "fluff"

I have a PCBA that seems to have failed due to poor wiring (no water damage). The screw terminals are for 230V AC input and electrical load relay. What isn't clear to me is what exactly is the "...
  • 11
0 votes
0 answers
217 views

Identify and source replacement common-mode noise choke

I have a circuit where the marked inductor common-mode noise choke in the image below is damaged. I am having massive trouble sourcing this inductor common-mode noise choke anywhere. No results on ...
  • 101
0 votes
0 answers
71 views

Substitution for 0.1Ω 2W metal film resistor?

I'm attempting to repair a Pure Sine Wave Inverter. I need to replace a damaged 0.1Ω 2W metal film resistor. I found the part that should work on digitkey: https://www.digikey.com/en/products/detail/...
  • 1
2 votes
1 answer
292 views

SMD SOT-25 identify component

Can I ask for help in identifying the following SMD component? Package is SOT-25. Marking is bPCGD . Probably is voltage detector but I dont know his parameters. It is a component of mainboard IP ...
  • 21
0 votes
0 answers
67 views

Repair pads on PCB

I've accidentally used too much force on the board while trying to remove a flex connector and so I've removed a lot of PCB pads as well (see image). I have a new flex connector, but I do not have ...
1 vote
0 answers
58 views

Water damage repair on solders

So this is the cicuit for a 1h0257j VolksWagen polo vacum pump for central lock. I got it for practice since it was replaced. The question the problematic part seems to be a burned soldering, it is ...
1 vote
0 answers
180 views

Can I bypass a trace from the diode to the solder point with wire?

I'm working on the button/power motherboard of an X-Box one's controller - the menu (start) button doesn't work. I think there might be damage to the trace when I followed the trace to the solder ...
0 votes
1 answer
114 views

Repair MRAM that's been exposed to a magnetic field

Is there any way to repair MRAM that has been exposed to a magnetic field? I've got a bit stuck (3rd bit) on my MRAM. Probably due to exposure to a magnetic field. Is there any way to fix this short ...
0 votes
0 answers
71 views

Requesting help identifying potential damaged resistor on PCB

The picture is a motor control board which recently failed. The digital console indicates some problem communicating with the motor. Inconsistent power supply and moisture MAY have played a factor. ...
0 votes
1 answer
111 views

Over voltage protection IC keeps burning

I am currently working on a project where over voltage protection is necessary. I made a test circuit using an LP5300 (SOT23-6 type.) https://datasheet.lcsc.com/szlcsc/1912111437_LOWPOWER-...
-1 votes
2 answers
109 views

What kind of camera could work inside a microwave?

I want to record video inside a microwave, is it possible? What if it was hid behind a shield or the same galvanized material as the door? The detailed structure may completely ruin visibility tho
8 votes
2 answers
2k views

Can continuity test cause component damage?

In order to test some tracks on a mounted PCB, I would like to use a multimeter for continuity test. However, then I measured the open-circuit voltage of two multimeters at hand, and the results were:...
  • 561
1 vote
1 answer
195 views

Can anyone help to identify this blown MOSFET? Top markings seem to include F50, "ON" in a circle, 3N and "RE4T" in a circle

I am trying to repair a PCB out of the welder. One of the problems I have found is a blown MOSFET. I have tried searching for a replacement with no luck, as I don't have a complete code. I have posted ...
0 votes
0 answers
160 views

Scratched capacitors at the top. Should I care?

I've ordered a couple of big capacitors and one of them (the one on the right) seems to have been repeatedly hammered by the other's leads during transportation. So much so that it has some ...
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0 votes
1 answer
94 views

Do I have to protect the CD4013 outputs from short circuits?

I'm trying to determine whether a CD4013BE ("CMOS Dual D-Type Flip Flop") can take damange if one of the outputs (Q or Q-bar) is set to high, but shortened to ground (or vice versa) with no resistor ...
  • 671
0 votes
1 answer
63 views

Does water damage explain this issue?

I posted previously that the hot water button (PA in red) no longer causes the hot water solenoid (Eac in red) to dispense water. It now causes the left coffee group solenoid (G1 in green) to dispense ...
0 votes
0 answers
62 views

How did an LED go from being a point source of light to an extended source?

A night light with an LED under a dome screen projected a sharp image initially, but a blurry image after the first night. The screen appeared to be undamaged, this led me to believe that the LED ...
2 votes
1 answer
347 views

Accidentally connected a GPS antenna to a cellular connector and a cellular antenna to a GPS port. What can go wrong? [closed]

I have two ultra small/sub-miniature coaxial connectors on my circuit board - one for a cellular (4G) antenna and one for a GPS antenna. I accidentally connected the cellular antenna to the GPS ...
  • 123
9 votes
3 answers
1k views

"recommended that CLK begin toggling within 150 ms ... to ensure long-term reliability of the device" -- why?

In Intel's Pentium Processor Family Developer Manual, regarding the CPU clock, it says that "it is recommended that CLK begin toggling within 150 ms after VCC reaches its proper operating level. This ...
4 votes
1 answer
417 views

Can capacitors be damaged by a DMM in continuity mode?

Some multimeters have a pretty high open circuit voltage in continuity test mode and resistance mode (possibly to improve SNR?), but they are current limited. For example, the Fluke 87V behave like an ...
0 votes
0 answers
80 views

Does this (seemingly) corrosion create problems for the operating of the chip?

We have a PCB of a VME machine of ours and it has some kind of white corrosion on it. Does this impact the functionality of the machine and what could it exactly be?
1 vote
0 answers
92 views

How could this capacitor have been damaged?

During testing, a capacitor was found to cause an intermittent failure - going short circuit when heated. The capacitor style is a through hole, radial lead, CECC rated 68nF MLCC. Our supplier makes ...
  • 1,088
2 votes
1 answer
2k views

Can WD40 be used to mitigate water damage on electronics?

I've heard the advice that WD40 is designed to repel water, and hence, it can supposedly be used to mitigate water damage in electronics. Such as for a device that was submerged, instead of simply ...
2 votes
2 answers
601 views

How can you damage DMM if you haven't discharged a capacitor?

Hi, I measured capacitance on some capacitors using my UNI-T 139S True RMS Multimeter without discharging them first. To be clear, I don't even know if they were charged because they are mounted on ...