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not start, pls rebuild

hw ok and correct voltages

Hi mate, I have a problem with HP 840 G2 that does not start. Blinking only red/white led in loop but not see anything. I have tried to write bios in top thread "HP 850 G2 ME OK" and "M71_0113_16MB" but it does not solve the problem. Which version do you recommend?

Hi, do you have this bios?

Can you rebuild it?

Can you rebuild it?

Hi, I have problems with the battery of this laptop: it recognizes the power supply inserted and gives the charging sign but it doesn't charge. Even if the battery is not connected, it is seen as connected. If you unplug the charger with the battery inserted it won't turn off. can you help me?

same problems

Hi I have a problem with this motherboard.. constant blue screens. Already replaced RAM, SSD, power supply but continues to have problems. I have a feeling it's an EC problem.

what is the bios? 16MB?

No start no led

here photo password

try this one

remove password please

no start pls check

same problem. no start

no start black screen

sorry..here!

rom in attached