iFixit - Active Questions With Device "Raspberry Pi 4"

Raspberry Pi 4: My SD reader is broken and I can't start the OS with an usb

Wed, 23 Apr 2025 03:42:51 -0700

My SD reader is broken and I can't start the OS with an usb. I tried to change the bootloader to make this possible but it doesn't work

⟐ Answered April 23, 2025 at 3:42 MST

Raspberry Pi 4: Will my device still function?

Wed, 12 Mar 2025 21:48:45 -0700

I wanted to boot ubuntu on my pi and i completely erased the files on the sd card. later, i was applying heatsinks on my board and noticed a little brown something on my board under the "GPIO" text under the headers. At first it felt like dirt to me and i pulled it out and later i realized solder marks under it. I am extremely anxious to know whether my raspberry will still function or not, and whats the ic number. Also, is it possible to get it fixed?

⟐ Commented March 12, 2025 at 21:48 MST

Raspberry Pi 4: Shows color screen than looks like disconnected from screen

Thu, 02 Jan 2025 10:12:09 -0700

I have my raspberry pi 4 plugged into a Anker surge protector (same thing happens without the surge protector) with this old Acer monitor that I had around, when it boots it will get to the color screen than disconnect, the monitor says no signal, raspberry pi worked on a TV but refuses to work with the monitor. I plugged an old Roku Stick into the monitor and it works. Any idea why my raspberry pi doesn't work with the monitor? Model number for the monitor is S231HL

⟐ Answer accepted January 02, 2025 at 10:12 MST

Raspberry Pi 4: [RPi4] Burnt out component, how to diagnose and replace

Wed, 11 Sep 2024 03:48:31 -0700

My Raspberry Pi 4 8GB v1.4 stopped drawing power recently.

I would plug it in to a battery bank, the red led would briefly flash, then turn off. The battery bank would report that no power was being drawn.

I eventually got it to accept power again, but the corner of the PCB near the USB 2.0 ports became very hot, and there was the telltale smell of components burning.

I think the large smd diode(?) near the USB 2.0 ports is to blame, but I'm not sure.

Can anybody help me find out what components are broken, and how to go about replacing them.

⟐ Answer accepted September 11, 2024 at 3:48 MST

Raspberry Pi 4: USB ports are dead

Wed, 14 Aug 2024 08:15:32 -0700

Hi guys. I have a RaspberryPi 4B 4GB (newer version) that had 9V instead of 5V put through the USB-C power input according to owner.

Surprisingly it boots and works, but ethernet and USB ports are dead. I replaced the BCM54213PE and VL805 chips I took from a donor board - ethernet works fine now, but no luck with USB.

I also replaced the crystals next to both of those chips - didn't help either.

Any ideas what else I should check?

⟐ Answer edited August 14, 2024 at 8:15 MST

Raspberry Pi 4: Only red light is blinking.

Sat, 25 Mar 2023 07:37:49 -0700

Only red light is blinking.i am shure there is no software issue.what can I do now.

⟐ Answered March 25, 2023 at 7:37 MST

Raspberry Pi 4: Why aren't my USB ports not working?

Sun, 10 Apr 2022 09:01:38 -0700

When I attempt to boot up either raspberry Pi OS or Retropi, neither will register any usb device (controller, keyboard, mouse) that I plug in. Mouse doesn't move, keyboard button inputs do nothing. When controllers (xbox 1/usb ps1 w/ adapter) are plugged in the device doesn't register their inputs though their power lights do come on.