hp 255 g7 .I found 2.5v on the RAM memory

[farag]

hp 255 g7
Motherboard
FPP55 LA-G07JP
Rev;2.0
2019-04-19
When changing the RAM memory, the problem started.
The ram has been changed
I shipped the bios
Nothing happened
Physimeter detection
There are1.2v and 2,5 v on the RAM memory
Anyone have any thoughts on what happened?

[farag]

Re: hp 255 g7 .I found 2.5v on the RAM memory

Sorry, forgot to mention the problem
The device is working but there is no display.
There are 5 flashes on cap lock

[reformatt]

Re: hp 255 g7 .I found 2.5v on the RAM memory

That's normal. DDR4 uses both 1.2V (VDDQ) and 2.5V (VPP) supplies. Look up the LED codes for HP to determine your error. 5 flashes is either 2,3 or 3,2 codes I'd say so look up the codes.

[mcplslg123]

Re: hp 255 g7 .I found 2.5v on the RAM memory

Consumption on dc supply
01.With ram
02.Without ram

DRAMRST# present??

[farag]

Re: hp 255 g7 .I found 2.5v on the RAM memory

That's normal. DDR4 uses both 1.2V (VDDQ) and 2.5V (VPP) supplies. Look up the LED codes for HP to determine your error. 5 flashes is either 2,3 or 3,2 codes I'd say so look up the codes.

I got this ((:3.2
Hardware
The embedded controller times out waiting for BIOS to return from memory initialization.
Reseat the memory. See the section Reseating memory modules in a notebook for more information.
If reseating the memory does not resolve the problem, try replacing the memory modules. You might also consider contacting support for repair due to ((a possible RAM or system board failure.

Changing the memory with a new unit did not change anything

[farag]

Re: hp 255 g7 .I found 2.5v on the RAM memory

Consumption on dc supply
01.With ram
02.Without ram

DRAMRST# present??

same values: 0.57A , 0.57A

[reformatt]

Re: hp 255 g7 .I found 2.5v on the RAM memory

I had this on an Elitebook 850 G3. Apparently the fault was intermittent leading up to it, and the RAM was certainly ok. Fault was regardless of slot used and the slots appeared physically ok too (sometimes you get bug shit on a few pins that can cause issues). As I don't have schematics for that one, the board has ended up a donor.

[farag]

Re: hp 255 g7 .I found 2.5v on the RAM memory

I had this on an Elitebook 850 G3. Apparently the fault was intermittent leading up to it, and the RAM was certainly ok. Fault was regardless of slot used and the slots appeared physically ok too (sometimes you get bug shit on a few pins that can cause issues). As I don't have schematics for that one, the board has ended up a donor.

Thanks for your time

[mcplslg123]

Re: hp 255 g7 .I found 2.5v on the RAM memory

same values: 0.57A , 0.57A

If consumption with/without ram is same, system is not reading ram. This can happen due to many reasons. Following should be checked.
01.Flash known good bios with clean me.
02.Check Ram IC Requirement
03.Check ram slot under microscope.
04.If the ram is onboard, it could be bad.Try disabling it.
05.could be pch fault.

[farag]

Re: hp 255 g7 .I found 2.5v on the RAM memory

If consumption with/without ram is same, system is not reading ram. This can happen due to many reasons. Following should be checked.
01.Flash known good bios with clean me.
02.Check Ram IC Requirement
03.Check ram slot under microscope.
04.If the ram is onboard, it could be bad.Try disabling it.
05.could be pch fault.

Thank you very much
I will try this