lg q520n new security [Answered] - GSM-Forum

ahwak · 08-05-2022, 18:00

no brom with keys

phone dead after downgrade and now show only preloader mode

need test point or how to crash brom

Selected model: Lg Q520N (Q52)
Operation: Write KDZ
Software version: 3.9

Extract scatter file... OK
Checking KDZ file...
Parse scatter file... OK
Host Power Off... OK
Switch virtual port to NONE... OK
Connect Type-C to HUB... OK
Host Power On... OK
Connect phone to BOX in BROM/PRELOADER Mode
Wait for device connecting... OK
Driver: [LG Electronics Inc.,UsbDiag,LGE Mobile USB Serial Port,lgx64diag.sys,5.3.0.0]
Device found at COM231 [PRELOADER]
Open port... OK
Send start cmd... OK
Get HW code from device... 0766
Get HW & SW version from device... OK
HW VER: CA00, SW VER: 0000, HW SUB CODE: 8A00
Detect chip [MT6765]
Library Version [2]
Select platform... OK
Init BROM... OK
Force Charge... OK
Disable WatchDog Timer... OK
Force switch to BROM... OK
Switch virtual port to USB... OK
Connect Type-C to BOX... OK
Host Power On... OK
Wait for device... timeout

Z3X · 08-05-2022, 18:19

Hello. Only testpoint in new lg firmwares.

mnafmf · 08-05-2022, 22:41

Quote:

Originally Posted by Z3X

Hello. Only testpoint in new lg firmwares.

Please add pictures for testpoint to shell

Z3X · 08-06-2022, 04:35

Quote:

Originally Posted by mnafmf

Please add pictures for testpoint to shell

We dont have it. If you are skilled tech - you can search and use some memory data lines to force brom.

tolitz_24 · 08-22-2022, 11:16

Please share pictures for testpoint
LG-Q520N
PLEASE HELP a new patch level
for testpoint thankyou...

Z3X · 08-22-2022, 11:22

If you are skilled tech - try short some data lines near cpu/memory.

KrzychuG · 08-23-2022, 19:09

You can downgrade it to any 2021 firmware, and then bootrom by keys will work again.

jessey · 10-18-2023, 00:18

Quote:

Originally Posted by KrzychuG

You can downgrade it to any 2021 firmware, and then bootrom by keys will work again.

how do you flash it when you cant put it in download mode???

i have one that's dead after downgrading to v10. mine was originally on v30. will appreciate any help in solving this problem.

Z3X · 10-18-2023, 07:29

Quote:

Originally Posted by jessey

how do you flash it when you cant put it in download mode???

i have one that's dead after downgrading to v10. mine was originally on v30. will appreciate any help in solving this problem.

Only tp will force brom, after this you will be able to flash phone.

08-05-2022, 18:00	#1 (permalink)
ahwak No Life Poster Join Date: Sep 2007 Posts: 684 Member: 591084 Status: Offline Thanks Meter: 41	lg q520n new security [Answered] no brom with keys phone dead after downgrade and now show only preloader mode need test point or how to crash brom Selected model: Lg Q520N (Q52) Operation: Write KDZ Software version: 3.9 Extract scatter file... OK Checking KDZ file... Parse scatter file... OK Host Power Off... OK Switch virtual port to NONE... OK Connect Type-C to HUB... OK Host Power On... OK Connect phone to BOX in BROM/PRELOADER Mode Wait for device connecting... OK Driver: [LG Electronics Inc.,UsbDiag,LGE Mobile USB Serial Port,lgx64diag.sys,5.3.0.0] Device found at COM231 [PRELOADER] Open port... OK Send start cmd... OK Get HW code from device... 0766 Get HW & SW version from device... OK HW VER: CA00, SW VER: 0000, HW SUB CODE: 8A00 Detect chip [MT6765] Library Version [2] Select platform... OK Init BROM... OK Force Charge... OK Disable WatchDog Timer... OK Force switch to BROM... OK Switch virtual port to USB... OK Connect Type-C to BOX... OK Host Power On... OK Wait for device... timeout

08-05-2022, 18:19	#2 (permalink)
Z3X Product Supporter Join Date: Feb 2008 Location: z3x Posts: 16,040 Member: 706257 Status: Offline Thanks Meter: 5,084	Hello. Only testpoint in new lg firmwares.

08-22-2022, 11:16	#5 (permalink)
tolitz_24 Insane Poster Join Date: Sep 2012 Location: Phillipines manila Posts: 92 Member: 1815277 Status: Offline Sonork: n04-11-005634 Thanks Meter: 5	Please share pictures for testpoint LG-Q520N PLEASE HELP a new patch level for testpoint thankyou...

08-22-2022, 11:22	#6 (permalink)
Z3X Product Supporter Join Date: Feb 2008 Location: z3x Posts: 16,040 Member: 706257 Status: Offline Thanks Meter: 5,084	If you are skilled tech - try short some data lines near cpu/memory.

08-23-2022, 19:09	#7 (permalink)
KrzychuG No Life Poster Join Date: Apr 2003 Location: Torun, Poland Age: 40 Posts: 1,198 Member: 25996 Status: Offline Thanks Meter: 254	You can downgrade it to any 2021 firmware, and then bootrom by keys will work again.