(347) 552-2258 help@rossmanngroup.com

820-3209 - 3 Beeps Issue

M

mccafe

Member
Hello,

C7553 was shorted (PPBUS_S5_HS_COMPUTING_ISNS). Replaced and now got fan spin, but getting 3 beeps indicating RAM issue?

Battery is connected and it runs off battery just fine.

PPBUS_G3H = 8.4 volts
PPDDR_S3_REG = 1.359 (low?)
PPVCORE_S0_CPU = 1.1 volts
PPCPUVCCIO_S0_REG = 1.08 volts
PP0V75_S3_MEM_VREFDQ_A = 0.67 volts

PP3V3_S0 = 3.3 volts

How should I begin troubleshooting this?

Thanks!
 
Last edited:
M

mccafe

Member
EDIT: I fixed it by reflowing all the RAM chips. I figured I probably used too high of a temperature for removing the shorted cap on the other side of the board.
 
M

mccafe

Member
Thank you for the tip! I will get some ordered.

As for your tweezers, which model do you recommend? I want to look into this.
 
Baltaszar

Baltaszar

New member
but its solder or flux? i think there is solder who melt with 58 °C... im using 138° bismute. Thanks for your time.. (in ebay only found flux chipquik)
 
2informaticos

2informaticos

Administrator
Staff member
The alloy is Bi58Sn42 and time ago was posted as 58 degrees melting point (by some sellers).
Its melting point is 138 degrees in fact, sorry for my error about 58 degrees.

Chip quik alloy en venta - | eBay

Encuentra Chip quik alloy en venta entre una amplia seleccion de en eBay.
www.ebay.es
 
You must log in or register to reply here.
Top