Power source with loud noise and does not work well (FDPS-100N-R5)
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by eliemghlenovo t14 i7 10 gen : I press the power button and there is a loud fan noise for about 3 seconds and power light is on. Nothing on display screen. i have removed the battery and bios battery still the same. i have put yesterday on update and charger ,i have leave and back and see this problem. Any One Can help Me ?09-27-2024, 02:40 AM
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by justice171Hello Badcaps Members,
I'm experiencing an issue with my Lenovo ThinkPad E15 Gen 2, and I'm hoping someone here might have some insight. The laptop charges to full capacity, but as soon as I power it up, I get a loud sound, and there's no POST.
I disconnected the battery and connected a USB meter, which shows 20V 0.23A when the sound occurs. I've already tried changing the screen, but it didn't resolve the issue.
When I use Lenovo PC Diagnostics App I get results as 01000
Here are the details:- Model: Lenovo ThinkPad E15 Gen 2
- Board Numbe
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by tony359Hi all,
I am working on a sound processor, it tends to overheat so I fitted a fan inside. The fan is connected to the +15V of the PSU via a DC-DC converter based on the LM2596 to reduce the voltage to around 10.5V.
Unfortunately the analogue circuitry is picking up the noise from the fan in two ways:
1. The fan is close to the analogue section, the motor itself gets into the outputs so I'll have to move it somewhere else
2. Even with the fan running outside of the case, there is still some noise which is clearly going back to the processor via power line....2 Photos -
by dicky96Hi guys
I have a DynAudio DBM50 here - it makes a loud hissing noise.
It sounds just like an FM radio with no antenna (or tuned off-station). The volume of the hissing fades up and down, sometimes drops to almost nothing then comes back loud. It occasionally makes a loud bump noise too.
It does this even with nothing connected to the audio input XLR
Any suggestions?...-
Channel: Troubleshooting Audio Equipment
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by LvsitanoI am having some trouble with troubleshooting a Asus X532FL rev 2.0 motherboard, which does not power on. So at the first MOSFET, I am getting 19V at the drain, and then 3.2V on both gate and source (compared with ground). Of course, the 2nd MOSFET's source will have 3.2v at source.
First MOSFET is a QM3056M6 and 2nd MOSFET is a QM0930M3
I already checked first MOSFET and source and gate are not shorted (drain with source not shorted either). Also I have 1.7V at the LDO rail (measured at the keyboard connector, as the power button is on the keyboard).
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