2,4 is a memory error -- and the memory in this model is not replaceable as it is hard soldered.

It's likely you'll find the cost of a replacement board near or more than what the system is worth.

Hi

There is a remote chance that it may be an M-BIST problem.

Initially dis-connect the battery and do a hard reset.

Try....

With the laptop completely off, hold M + Power:

• If the same 2 amber + 4 white pattern appears, it confirms the 9305’s M-BIST unrecoverable SPI/system-board fault.

• If M-BIST passes but normal startup gives the code, the embedded RAM or motherboard memory circuitry is likely failing.

So the likely outcome is either spend money on a repair, or buy a refurb/replacement.

OR as @ejn63 states, the truth is, it is BER (Beyond Econimic Repair).