It indicated BAD RAM. Either you replace the entire kit or determine which Module is bad by following the part 3 of the tutorial How to Test and Diagnose RAM Issues with Memtest86+
and change that module.
Errors/red lines means one or more RAM is faulty. But the fault may occur due to a faulty DIMM slot, too, which is a motherboard component
. Using memtest86+, you can discriminate between a faulty RAM and a faulty motherboard.
How? Say you have two RAM sticks and two DIMM slots. You obtained errors at the test with all RAM sticks installed. Now, remove all the sticks but one. Test it in all the available slots, one by one. Continue the same procedure for all the available sticks
Stop testing a particular RAM stick as and when you get the first red line.
How to make the inference that is it a RAM issue or it is a motherboard issue? Suppose you have got the result like that:
It is a RAM, a bad RAM.
But if you have got a result like that:
It is a motherboard issue. The particular slot is bad.