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Questions tagged [damage]

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Mutilated PCB - DRAM solder pads gone/bridged. Repairable? [closed]

I was attempting a DRAM upgrade with a heated plate and hot air rework station. I probably went overzealous on cleaning this area with the copper wick, and it seems to have sanded or scratched the PCB....
Larry Cai's user avatar
  • 109
2 votes
1 answer
43 views

Is there a risk of damaging built in RF components having several Iridium SBD 9603N modems active close to each others?

I use Iridium SBD 9603 N modems in some hardware (oceanographic buoys). I use high gain antenna, typically the setup is based on https://www.sparkfun.com/products/18712 and https://www.sparkfun.com/...
Zorglub29's user avatar
  • 373
0 votes
1 answer
71 views

guitar amp experienced over-voltage [closed]

Disclaimer: I am not an electrical engineer, I made a mistake which left a piece of equipment in what feels like it should be a salvageable state, but I don't know where to start correcting it. So, I ...
AJFaraday's user avatar
  • 101
0 votes
3 answers
137 views

How to find out if the PIC microcontroller is good or dead?

I am working with a PIC microcontroller (part number dsPIC33FJ64MC802). Previously I was able to program it fine. But today, I have powered the PCB which contains the PIC microcontroller, then ...
Vikram's user avatar
  • 21
1 vote
1 answer
242 views

Testing out a bridge rectifier if it works with only a multimeter

Indulge me here with this scenario, but suppose the electronics shop I'm sourcing parts have dubious, faulty semiconductors parts -- damaged, counterfeit, etc. What have you. How do I test if a bridge ...
Tempus Nomen's user avatar
1 vote
1 answer
170 views

How to fix a broken relay that's still clicking?

Last week, one of my cooking plates was not working any more. I was able to track the problem down to the cooking plate relay (Finder relay type 45.61, 14Vdc, 16A, 250Vac). This relay still makes ...
Stefan Wyss's user avatar
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2 votes
2 answers
214 views

I keep Blowing up my i2C (ISO1540) isolator when plugging and unplugging my battery

I am using a ISO1540 to read the SMBus of some BB2590 batteries. The relevant part of the circuit is shown in the images below The issue that I am having is that sometimes when connecting or ...
Pepe's user avatar
  • 53
5 votes
3 answers
204 views

Would a Hall effect sensor be damaged by gross saturation?

There's this old question that is almost what I'm looking for, but not quite. I want to make a current direction sensor - I don't care about magnitude - for a car starter battery. I care about the ...
AaronD's user avatar
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0 votes
1 answer
72 views

General guidelines to avoid damaging RF components

So, I am a young researcher in physics and use RF components like splitters, mixers, couplers, amplifiers, etc. These are not high voltage amplitudes at all - at most a few volts - often hundreds of ...
qmstatmech's user avatar
1 vote
1 answer
96 views

Is this inductor ok?

I was cleaning a 10+ year old LCD TV with a damp rag and noticed an ozone-like smell. I assumed a chip was frying or something was arcing. I unplugged it, gave the power supply some time to discharge, ...
David Ehrmann's user avatar
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85 views

Fluke 393 checked resistance on a live circuit wonder if I damaged my meter

I have a fluke-393 multimeter and I was testing voltage on a 480V circuit didn’t realize I was on resistance and when I put my probes on the circuit there was a small arc, quickly taking my probes off ...
Grant's user avatar
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0 votes
2 answers
83 views

Possible degree of damage to PSU

The following PSU accidentally got 400 V instead of 230 V at J6. There is a fuse built into the power switch, which is connected to J6. The fuse blew on the original incident. Trying to replace the ...
oliver's user avatar
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0 answers
97 views

Small indentation in rechargeable battery

I bought a small lamp and opened it up. I used a knife to carefully separate the top from the bottom shell and I am pretty sure I didn't insert it that much to create the two points on the left, and ...
inktrap's user avatar
  • 101
17 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 ...
riptusk331's user avatar
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 ...
David Molony's user avatar
  • 1,179
1 vote
0 answers
305 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, ...
SpacePhoenix's user avatar
2 votes
2 answers
103 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 ...
SuperStew's user avatar
  • 135
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 ...
PMF's user avatar
  • 692
4 votes
0 answers
143 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 ...
Rocketmagnet's user avatar
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-1 votes
1 answer
131 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 ...
Noradan's user avatar
0 votes
1 answer
2k 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 ...
kevin zamora's user avatar
0 votes
0 answers
106 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 ...
Xander van den Berg's user avatar
3 votes
2 answers
318 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 ...
personal_cloud's user avatar
0 votes
1 answer
199 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 ...
damaged_charger's user avatar
1 vote
1 answer
120 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 ...
Guorishix's user avatar
1 vote
1 answer
175 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 ...
EmilBonnevie's user avatar
3 votes
0 answers
326 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 ...
Scott's user avatar
  • 191
0 votes
2 answers
203 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 ...
Chris's user avatar
  • 103
2 votes
3 answers
130 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 ...
J Collins's user avatar
  • 585
1 vote
1 answer
587 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 ...
Yanick Salzmann's user avatar
1 vote
1 answer
381 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 ...
Steve Ives's user avatar
-1 votes
1 answer
79 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 ...
user3171804's user avatar
0 votes
0 answers
179 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. ...
Ogami musashi's user avatar
1 vote
2 answers
508 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?
Walid's user avatar
  • 19
0 votes
1 answer
112 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 (...
wyomo's user avatar
  • 3
0 votes
0 answers
35 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 ...
pw_v's user avatar
  • 1
0 votes
0 answers
58 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 ...
cherlie margnus's user avatar
2 votes
2 answers
306 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 ...
fab's user avatar
  • 123
2 votes
0 answers
63 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 &...
NMech's user avatar
  • 121
1 vote
1 answer
78 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 "...
Zygis's user avatar
  • 68
0 votes
0 answers
354 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 ...
Stefan's user avatar
  • 101
0 votes
0 answers
114 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/...
c4am95's user avatar
  • 1
2 votes
1 answer
649 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 ...
r adcza's user avatar
  • 21
0 votes
0 answers
73 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 ...
Chen Avnery's user avatar
1 vote
0 answers
103 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 ...
Anonymus51's user avatar
1 vote
0 answers
269 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 ...
Drew3121's user avatar
0 votes
1 answer
160 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 ...
Arno van der Weijden's user avatar
0 votes
0 answers
79 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. ...
nachonachoman's user avatar
0 votes
1 answer
137 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-...
Malcommand's user avatar
-1 votes
2 answers
125 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
tigertiger's user avatar