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CPU Upgrade for Toshiba Satellite L550 & L555 with HM55 chipset
Greetings guys!

Im so desperate, i have tried running i3 370M and i5 560M on this motherboard, wasted a lot of money on these but bios does not support either.

Chipset: HM55
Direct BIOS download link:

Bios version 2.2, this is the last updated one on Toshibas page.

Anyone please tell me what to do?

Or maybe if it is possible to unlock a cpu support in bios, i would be very grateful, even willing to pay you!
Hello Guys,
I've This Laptop and looking for an Mod Bios
BIOS: Phoenix Securecore (1.20 right now but im updating)
BIOS Link: (2.20)
Need CPU Support for I560M, hidden tables and so on...


Can I Flash this BIOS with Winphlash?
or What tool i should use?
Post a screenshot of third (Mainboard) tab of CPU-Z.
(12-09-2020, 12:19 PM)DeathBringer Wrote: Post a screenshot of third (Mainboard) tab of CPU-Z.

Target CPU is:

Attached Files Thumbnail(s)
Your laptop is based on LA-5322P motherboard. It has BIOS without support for stepping K0.
So you can use only these CPUs with stepping C2:
  1. Celeron P4500 (SLBNL)
  2. Pentium P6000 (SLBWB)
  3. i3-330M (SLBMD)
  4. i3-350M (SLBPK)
  5. i5-430M (SLBPN)
  6. i5-520M (SLBNB)
  7. i5-540M (SLBPG)
  8. i7-620M (SLBPD)
It can't be changed by adding microcode.
How can I make the BIOS Update? with Winphlash?
My accu is dead so the original tool dont let me...
No, Winphlash isn't not compatible. It's Phoenix SecureCore Tiano BIOS.
Try to edit BIOSCheck.ini and set BatteryCap to zero.
Poorly dont work
Toshiba satellite l550-12d
Version: PSLWSE-00M013ru
Chipset: BD82HM55 SLGZS
Processor: I7- 640m SLBTN J030D356
I7-740qm SLBQG
It refuses to start, although the chipset supports these processors. Processors tested working!!! A whitelist is also installed on network cards, for example, on AC-7260. Please help if possible!

Attached Files
.zip (Size: 3.26 MB / Downloads: 0)
Post screenshots of first (CPU) & third (Mainboard) tabs of CPU-Z with supported CPU.

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