I want to buy a dead power suplly like this. The owner said that it doesn't start. What can be the defect, because i this it's a common deffect.
Can you help me?
Can you help me?
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I have a question - I have replaced the PSU on my own iMac Pro. However, when removing the motherboard I knocked of a 120 OHM 30% 0.3A small surface mount common mode inductor/filter (~0602 size) in the ethernet circuit near the female RJ45 port.
The closest match I can find on Mouser is 120 OHM common mode inductor at 100MHz - my question is this frequency correct for a motherboard? The schematic for the motherboard only provides '120 OHM 30% 0.3A' and the TDK part number does not return anything in google.
Sorry, I am not experienced hence a basic question.
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I have faulty HP ProBook 450-G2 LA-B181P - doesnot start. When connecting a charger, the LED on plug in connector blinks from yellow to blue. (I tried to search a short on mainboard.)
What is a common resistance ( to ground ) I should measure on a coil that leads to VGA chip(RT8880CGQW) ? I measure only about 9.6 Ohms. Is it normal?03-11-2025, 05:26 AM -
I've got a control display for a Carrier chiller that I'm trying to understand what the common failure with these boards are. This is the board in question https://www.supplyhouse.com/Carrier-...arquee-Display all of them seem to develop a failure with the up and down arrow buttons on the right side of the display, the esc and enter keys I've never seen fail. Once these boards are plugged in they run 24/7, you used to have to press extremely hard with the end of the blunt screwdriver and you could still get the arrows to work but now it has completely stopped working. The button... -
Hi Guys, I have a HP DAX12AMB6D0 REV.D with a strange defect, that is on the 2nd mosfet on the power supply, the gate voltage does not reach 25V but pulses... if I try to touch some capacitors with my fingers, the voltage on the gate reaches 25V and the notebook turns on.
I have already tried to change the charging connector, PU1 and PQ20 but I have not obtained any result, the problem still persists.
Here are the voltages that I find ON PU1:
Pin 1 - Pulses between 2 and 3v
Pin 2 - Pulses between 2 and 3v
Pin 3 - Pulses between 2 and 3v
Pin 4 - Pulses between... -
Just wondering how common it is for these types of caps to go bad. I have a couple that are measuring approximately correct (997nF) however a couple of them show signs that they have been pretty warm at some point. I'm replacing them anyway but just wanted to know how common it is for these to maybe act up when hot....