820-01814 strange USB activity

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • samolo75
    Senior Member
    • Oct 2020
    • 67
    • spain

    #21
    Re: 820-01814 strange USB activity

    I connected extracted the content from UB090 and attach it here. I compared it with the files I found here in the forum and they don't seem to have the same content. Shouldn't they being the same? I just wonder if it is save to write the file to the rom and install it. Sizes of the files are identical, at least
    Thanks in advance

    EDIT. I deleted the files from this post and added them to the BIOS Request only channel.
    Last edited by samolo75; 06-03-2023, 04:18 AM.

    Comment

    • samolo75
      Senior Member
      • Oct 2020
      • 67
      • spain

      #22
      Re: 820-01814 strange USB activity

      Well, I did flash the UB090 just in case, and no changes, works the same as before.

      Comment

      Related Topics

      Collapse

      • Stephen
        A1989 Logic Board Repair Issue. One CD3215 chip is the culprit
        by Stephen
        As the title states, got one CD3215 chip being a complete butthole to me. All readings on the other 3 chips read as follows
        5.16V .47amp
        5.16V .47amp
        5.16V .47amp
        5.16V .04amp (this guy is the issue) (U3200)

        So I went ahead and replaced the chip, (actually 3 times with 3 new CD3215 chips) all same issue, at first it wasn't reading at all then it finally started reading. I can rest assured is it not the CD3215 chip now but something else is causing this port to not fully read (god I wish the board would just turn on so we can just recover the data)
        ...
        11-27-2023, 03:57 PM
      • Cemal Odabasioglu
        MacBook Pro A1707 Motherboard Diagnostic Help – CD3215 heating and Fluctuating Rails
        by Cemal Odabasioglu
        Hello everyone,

        I'm currently diagnosing a MacBook Pro A1707 motherboard that does not power on. I've gathered some data but am stuck and need expert advice.
        Note that i'm a beginner in electronics and i'm trying to learn while trying to repair this macbook that my work gave me. I'm really curious and love understanding how thing works and i already learned so much.

        Only one usb c port is taking 20v and have 12.5v on PPBUS_G3H. when trying other ports, 2 are not going to 20v and one is going to 20v but the CD3215 is getting really hot.

        Observations...
        01-14-2025, 03:54 PM
      • Raven7032
        Dell G15 Ryzen Edition (LA-K454P) – No SPI Activity, No Boot, No startup
        by Raven7032
        Hello everyone!
        Stucked with this problem.
        Model: Dell G15 Ryzen Edition
        Board: GDL LA-K454P
        Symptoms:
        • Board powers on (consumption ~0.5A), but no boot or display.
        • Fans spin briefly, keyboard backlight turns on, then fans stop.
        • Can be shut down via power button (EC active).
        • No POST, no BIOS splash, no backlight.
        • Led is blinking 2 orange 1 white
        • No activity on SPI bus (no CS#, no CLK, no MOSI/MISO) even after pressing power.
        • No APU_PCIE_RST# - 0V
        Measurements:
        • All voltage rails present: +1.8V, +0.75V, +3VS, +5VS, VDDCR_VDD, VDDCR_SOC, DDR VDDQ, VTT.
        • EC_RSMRST#
        ...
        06-26-2025, 11:47 PM
      • survivalbloke
        Acer Predator Helios 300 - will not power up if battery is CONNECTED
        by survivalbloke
        This was a no power initially. Thanks to your help, I discovered it was the first mosfet, so I replaced. Now, the device will power up only if the battery is NOT connected. As soon as I connect the battery, it shuts off. If I connected the battery while the device is off, it simply will not respond to the power button. I replaced the battery, and while I suppose the new battery could be faulty, I'm assuming it is not. I'm having the same behavior with the new battery. I measure .2v at the charging coil. Manually applying power to the + and - at the battery header, there is no charging happening....
        06-25-2025, 12:20 PM
      • beogeek
        820-2915-A Wont power on with battery connected
        by beogeek
        Ok so this doing my head in and hopefully someone more knowledgeable will be able to assist.

        I've got a MacBook Pro 820-2915-A it will power on without the battery connected, but when the battery is connected it will do a 2,3-second fan spin when pressing the power button and then nothing.

        After measuring and probing around I found that R7051 was bad, reading high instead of 2.2Ω so I replaced it. Still the same issue, I have the green light on the charger but it won't power on or charge the battery.

        So to cut the long story short I've replaced U7000,...
        02-26-2022, 01:29 AM
      • Loading...
      • No more items.
      Working...