Recent content by jjloki222

  1. jjloki222

    PS5 displays logo then shot down!

    I have one similar to yours. I can enter the OS with no issue. However, whenever I try to start a game, PS5 throw out this error. Do you have any information to share? really appeciate that!
  2. jjloki222

    Hardware PS5 Blue Light for 2 Seconds - Low Resistance on 1.3V Rails, Need Help with Diagnosis

    Hi everyone, I'm facing a issue with my PS5, and I’m hoping for some advice from the community. When I try to power it on, it shows a blue light for about 2 seconds and then shuts off. Here's what I've done so far in my troubleshooting: Measured resistanceon the three 1.3V ram power rails...
  3. jjloki222

    switch OLED with 100ma power draw

    got it. Thanks a lot for all your wonderful knowledge sharing. really appreciate your help!
  4. jjloki222

    switch OLED with 100ma power draw

    Thanks a lot and I will do more research on this! The fuse is burnt in the boot0/1 or normal storage area? if it's in boot0/1 and the checks is done by boot processor at the very early stage of the boot procedure, it's messed up quite seriously... ...
  5. jjloki222

    switch OLED with 100ma power draw

    sorry for my ignorance and thanks a lot for pointing this out! I didn't even notice there is such a mechanism there! (I should read more about this. ) so even I install the Emmc correctly, there is a chance that the boot processor would refuse to boot if the fuse internal to the SoC is mismatch...
  6. jjloki222

    switch OLED with 100ma power draw

    Thanks for your confirmation! I was planning to do a power rails and critical signals dependency analysis by a logic analyzer just for learning the boot procedure. I don't really remember the versions unfortunately. The backup was a raw backup including boot0/1 done by a bga programmer so it...
  7. jjloki222

    switch OLED with 100ma power draw

    yes, it was from the previous backup from the same OLED switch. actually, the picofly installation worked for several weeks and stopped working after a child dropped the console on the ground. so I got rid of the picofly and want to do a clean boot to do more diagnose. unfortunately, it's not...
  8. jjloki222

    switch OLED with 100ma power draw

    It was a failed picofly installation attempt. I rebuilt the emmc with previous backup data by a programmer and after I reballed/reinstalled the emmc, it stuck in this status. (I have no access to the date0 point so I can not verify the installation is correct or not with an oscilloscope...
  9. jjloki222

    switch OLED with 100ma power draw

    Hi to all! I have an OLED switch with 100ma power draw and doesn't turn on. The board has one of the four inductors around MAX77812 with 0.6v output and the rest three don't have any voltage present (I expect all should have 0.6v present on a normal board). MAX77620 1.3v power rail is not...
  10. jjloki222

    is there a way to tell max17050 failure from cpu, emmc failure

    Hi all, I have an OLED switch failed to start properly. The current is around 110ma and stuck there. The 1.8v 0.8v 1.1v voltage around MAX77620 is present except the 1.3v power rail. MAX77812 only has one 0.6v present instead of four. since both max17050 and emmc get involved in the boot...
  11. jjloki222

    Hacking Fresh installed HWFLY OLED. Hekate show Battery 0%, 0 amp current

    hello, progress update: as expected, fixing the line did fix the issue!
  12. jjloki222

    Hacking Fresh installed HWFLY OLED. Hekate show Battery 0%, 0 amp current

    I didn't get the chance to fix it yet. Theoretically, I would say yes since the line is actually SCL/SDA trace for on-board chip communication including MAX10705 which is in charge of current/battery sensing. I will keep update the result once I get the chance to fix it.
  13. jjloki222

    Hacking Fresh installed HWFLY OLED. Hekate show Battery 0%, 0 amp current

    update! finally, I found the scl/sda trace around the CPU is cut! it's cut by my multimeter probes when measuring the inductor beside it! whew! no wonder CPU can't talk to MAX10705 for battery and current info!
  14. jjloki222

    hi newbie here

    Hi everyone, I'm newbie here. I'm really into fixing my Nintendo switch and get my head around how this clock jamming thing works! anyone who is also enthusiastic about playing with hardware, let's have some fun here!
  15. jjloki222

    Hacking Fresh installed HWFLY OLED. Hekate show Battery 0%, 0 amp current

    Thanks for reply. I checked the trace around the CPU upper part area around point D. The traces look good to me. I have uploaded the picture. I also attached an OLED naked board picture with it just for easy comparison. 1697619409 Thanks for sharing your experiences. Unfortunately, my case...
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