Hi all

Dell Inspiron 570 RAM memory upgrade problem

System

Insprion 570 mATX desktop

A06 bios

4gJJT motherboard

64 bit windows 10

4 DIMM slots (2GB max each)

Trying to go from 4 to 5 GB
I currently have two 2GB 240p PC3-10600 CL9 16c 128x8 DDR3-1333 2Rx8 1.5V UDIMM RFB

EBJ21UE8BDF0-DJ-F CJI 2GB 240p PC3-10600 CL9 16c 128x8 DDR3-1333 2Rx8 1.5V UDIMM RFB, Elpida

Current setup, everything fine

DIMM 4 2GB  EPBJ21UE8BDF0-DJ-F

DIMM 2  2GB  EPBJ21UE8BDF0-DJ-F

Upgrade
I acquired a  KVR1333D3N9K3/3G Kingston 1GB DDR3 1Rx8 PC3-10600U

 DIMM 1 damaged and unusable clip and two connector teeth missing

I tried the new RAM module in empty DIMM 3 but PC failed to boot
 just blue light.

The new RAM module is functioning  on own with the original RAM removed and NEW added  PC boots correctly and module passing all diagnostics

f The service manual says

Dell™ Inspiron™ 560/570 Service Manual

Recommended Memory Configuration see page 27

570

one RAM module = DIMM 4

two RAM module = DIMM 4 and 3

three RAM module = DIMM 4 ,3,2

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Is the service manual wrong?

Why won't PC recognize the new ram module and BOOT  is slot 3 ?

regards