purple screen on OLED After picofly install

[MKVINS]

hi guys. After +/- 10 OLED picofly install, i get purple screen . i take care of the CMD resistor but Is gone i think. can i take the 4.7 ohm 0201 resistor from One rp2040 defective board i have here for not wait 10 or plus day for order It from AliExpress?and if yes, what i can take? anyway i dont know how It fail... i not overheat It and soldering seems ok...tnx in advance

 

[jkyoho]

you might find 47 ohm or 10k ohm from that board but not 4.7K ohm you need

 

[MKVINS]

ok tnx for the reply. i order this from AliExpress:
https://a.aliexpress.com/_EJHbMw9
but i get It in one week if Is good. Is something i can do in this time for assure me i not burn all? tnx in advance

edit: i remove all flat cable and i read the value for the cmd point and i see 005 and for the resistor on the left side i get 047. i think the CMD Is gone even It look good. i need to wait but i dont have air solder station..

Post automatically merged: Oct 30, 2024

update: i have some photo of the point and all seems to be good.. if i change scale of the multimeter i can see 47k for the left resistor and 4.7k for the CMD resistor so i read the right value i think. i try to add some soldering on CMD point but nothing change. if the value Is correct what can be the problem? i rally dont understand...

 

[MKVINS]

i see this video and he change the resistor with a 0201 10k . can i can use a 10k resistor from a defective picofly board or i Need to wait 15 days for take the 4.7k resistor from AliExpress?

 

[jkyoho]

i see this video and he change the resistor with a 0201 10k . can i can use a 10k resistor from a defective picofly board or i Need to wait 15 days for take the 4.7k resistor from AliExpress?

Give a try! it will be either work or purple again. wont harm to try with a 10k resistor

 

[MKVINS]

i'm scaried about burn the other neighbor resistor why i dont have an hot air station... but maybe i can get the 47 k resistor from the picofly board too... anyway i dont understand what Is going on... i can read 4.69k for the A point and 47k for the neighbor so maybe the resistor Is ok, but if this Is not the problem, what It can be? emmc? i dont overheat It... anyway i have read the C point too and the First time i get 0.950 ohm so i change the dat0 adapter and now i see 0.870 , sometimes 0.89... i m not new in microsoldering and i have something like 50 V2 and 10 OLED done and this Is never appen... on another OLED i put the flat cable and remove It for 3 times why i get a defective chip and i dont burn anything.. now i get this purple screen... this time i dont understand at all but i dont want brick this OLED why Is new this can be my last OLED i think..

 

[jkyoho]

if solder iron would create things bad, hot air station would just make bad things come easier.
Having practical tools like precise soldering tip would dramatically decrease failure rate and shorten learning curve

 

[bvang913]

It can still read properly and still be broken. I would suggest just replacing it. It's possible by hand and don't necessarily need a hot air station. I've done it myself with steady hands and soldering iron.

 

[MKVINS]

nothing guys... the 4.7k resistor Is arrived today, i put It with soldering iron and i do a good job but i got same instant purple screen on boot.. i change another one resistor and nothing changed.. i think i fuxxed It up but i am sure i do a good job and i dont know what is wrong here if Is not this resistor and the dat0 adapter Is not why i change It for assurance, what It can be? i'm desperate... i think this Is my last OLED i do

 

[randy_w]

Did you reflow your dat0 adapter? if so there's a chance that it moves due to surface tension of flux or wind from hot air station and it will short dat0 ball to nearby dat1. Even when they are shorted diode reading is still normal, around 0.7-0.8v. Happened to me several times, had to take off emmc chip and do a reball.

At this point I'd say take off the emmc chip and try to read its content with a programmer, might be a dead emmc. Also measure emmc cmd pad's continuity to the cmd resistor, make sure you didn't damage the pad under it when replacing the resistor.

 

[MKVINS]

this Is all the story: First time i put the dat0 adapter i read 0.9/0.93 on this skynix model. i try to move the adapter and i get the same reading so i complete all the mod and when i try It i get the no SD screen and i press +/- volume button for skip the chip and enter to ofw but i got black screen or stuck at the Nintendo logo and After resoldering all the point and check It under microscope and nothing changed, i have changed dat0 adapter with another one and i get the same reading and the same problem so i disconnect the flat cable , c and b point from the chip and i try to boot and he start on ofw. so for try to do something i update to the last 19.0.1 firmware to 18.1.0 and After finish the update i restart the console and i get black screen and Nintendo logo alternate but After sometimes (that i never seen before) he started without do anything. i reboot another time and i get purple screen many times so i try to touch with iron the CMD and the other neighbor resistance and sp1 and sp2 and obliviously i clean all with ipa but when i try to start It i get a really bad buzzing like something Is frying so i disconnect fast the battery and check all under microscope but all Is ok. so i retry to connect the battery and boot It up and i get purple screen. i leave It for days and today i try to change 3 times the 4.7k resistor i get new, i got a really good work, the pad connection under the 4.7k resistor Is ok but i get only purple screen and i'm here... sorry for the length of the explanation and thx for all help

Edit: i dont use hot air station why i dont have One. but maybe thinking about it, I made a mistake: i put a Little amount of flux on the dat0 point on every sk hynix i have modded in the hope It can Stick with the point with his High usage temp... i am wrong right? anyway i use the half moon dat0 adapter so i dont think i get it shorted but maybe with the flux... now i have all flat cable disconnected but the second dat0 adapter i have tried Is still in there. maybe i get It 2 times short with dat1 point? Is there a chance of remove the dat0 adapter and the purple screen gone? anyway i dont have a emmc Reader and i cant do a reballing of the emmc but if can help, my brother have a nand backup of his sk hynix modded OLED i have done for him

 

[MKVINS]

for you guys is the eMMC? if the dat0 point and dat1 are bridged, the MMC Is dead Forever or if i can remove the short can work again?

 

[MKVINS]

no one can help?

Post automatically merged: Nov 13, 2024

maybe the emmc Is corrupted for some reason? i've read someone with purple screen on OLED have the emummc working. if i reinstall the rp2040 can i create the emmc with a corrupted MMC? i dont think so..

 

[randy_w]

Purple screen isn't always caused by a bad cmd resistor, although cmd resistor is the most common cause of it on oled (since you solder to it). It only means the bootloader can't read from emmc and throws an error message. It could also be a corrupted emmc, shorted dat0, or even a dead emmc. Shorted dat0 won't kill the emmc chip, just need to remove the dat0 adapter and reinsert it properly. Happened to me many times before when I was reflowing dat0 adapters (like 1 in 3 installs, melted solder/flux will pull dat0 adapter in and if it's not placed precisely on dat0 ball it will short to nearby dat1), had to desolder emmc chip and reball. Finally gave up on reflowing and went straight for reballing instead.

My best guess is that you left the dat0 wire dangling around when you booted ofw and updated it. dat0 wire caused interference and corrupted your emmc. It happened to many people using badly designed picofly core style chips (the one relocates emmc chip), interference on data lines corrupts/bricks emmc.

If you don't have hot air station then your best bet is to reinstall the modchip, hope it boots to hekate, then you can do an emmc rebuild. Yes it's doable even with a dead/blank emmc, only catch is that the switch will be banned (not from nintendo's end but you lose prodinfo which holds all certificates needed to connect to nintendo server). Did it once before, the toshiba emmc was fried when desoldering, no idea why i used same temperature setting when doing other switches. Replaced it with a blank samsung one, modchip will write the payload to the new emmc and boot to hekate.

 

[MKVINS]

tnx for the reply mate, you give me some hope. i remove the dat0 adapter but nothing changed so i think i have a corrupt MMC. i can buy the hot air station if It needed. but what i can do after i buy It?

 

[randy_w]

Without a hot air station your best bet is to fit the dat0 adapter properly and hope the emmc is just corrupted and not completely dead. The modchip needs to write the payload to boot partitions of emmc then boot from it. If the emmc is completely dead then there's nothing you can do, need to replace the emmc chip. You can also use the led pattern on picofly to try to identify the problem

If you got a hot air station, remove the emmc chip and dump it with a programmer, if the chip can still be recognized. if you don't have a emmc programmer you can get a sd card based one specifically made for switch that can read/write boot partitions for about $50 on aliexpress.

Then verify the cmd resistor continuity to the cmd pad underneath emmc, since you soldered/desoldered the resistor several times i'd make sure the pad is not destroied.

If the emmc chip is dead then you need to replace it with a new emmc, capacity doesn't matter, last time I replaced it with a 16gb one from an android tv box, and all the way up to 512gb if you want to do an upgrade. you can solder in the empty new chip, but the console won't boot without modchip.

Might as well do a direct dat0 connection since you are taking the emmc chip off. anyway install the new/original emmc chip and modchip, if there's no issue the console should boot to hekate. Then you do a emmc rebuild, that should bring the switch back to life

 

[MKVINS]

i reinstall the modchip and i can enter in hekate. First couple of time i see the emmc info like the photo and i got emmc error 400mbp/s. but i cant make an emmc backup so i cant create the folder with unique code for try the emmc rebuild lvl 3 on the sthetix video. now After a couple of restart i cant see nothing in emmc info... i think i Need a reball with a new one right?

 

[MKVINS]

https://a.aliexpress.com/_EvjvIbB

if i have an sk hynix emmc like the photo can i take this on the AliExpress link or Samsung emmc Is Better? tnx in advance

Post automatically merged: Nov 17, 2024

i buy this sk hynix on AliExpress hope i can revive It. tnx for help. i update when the job Is done

 

[MKVINS]

hi all. on the waiting time i receive the new blank MMC i have ordered, i see some post that tell the problem can be the resistor on the picofly board and Just add more have achieved the problem for some people so i decide to try It with another chip i have. i change 2 47 ohm with 100 ohm and on the 240ohm i have putted in a 1000 ohm. try to boot up and the chip tell me no dat0 point so i not fix It. i rechange the chip with the other with the original resistor and i want try to update to the latest 2.80 firmware so i open picofly toolbox for try to update it from there but i cant receive the firmware version installed and if i try to flash a new firmware i got the done message but on restart no White led and no update... i really dont understand WTF Is going on... anyway maybe i have find a OLED with broken display for a couple of Money. i Hope the mainboard Is ok so i can change It and fix all. tomorrow i go to get it. this OLED get me Crazy

 

[MKVINS]

update. i have find a crashed OLED with broken display and i try to take the mainboard and put on my OLED. obliviously he have no sign of life even on charge.. i try to see any damage under microscope but all seems ok... if i take the emmc from this dead switch and i reball it on my OLED with dead emmc can not work if i understand right ... i'm not lucky at all
last remaining thing Is the blank emmc i have ordered or this switch Is Lost