Hello guys,
Здраствуйте ребята!
My Dell T5500 doesn't post any video screen - black screen. It happened ever since it has been moved to another room (perhaps moisture broke it - it is just a speculation).
Symptom - When I powered it ON:
- the LED indication in front of the PC are (1) is solid green, the rest (2), (3) and (4) are OFF.
- The power button is Solid GREEN.
- The Sound code beep is 1-3-2.
According to the book the sound been indication means "1st 64 K RAM test in progress or failure".
Pre – POST Diagnostic LED Patterns - Reserved / Reserved
POST Diagnostic LED Patterns - MEM / Memory / Memory subsystem configuration activity is in progress. No memory modules were detected.
Референция -
https://www.dell.com/support/article/bg/en/bgbsdt1/sln288786/precision-t3500-t5500-t7500-workstations-diagnostic-lights-and-beep-codes?lang=enAll parts - RAM, CPU, VIDEO have been tested separately and together on another machine and are working fine, so it seems the motherboard is the problem.
Not sure if it is the BIOS or some paths to the RAM slots, perhaps resistors or DIODs?
Looked for cold joints, did a hot air spoils on some sections of the board but after this the PC is acting the same, no difference!
Would like to have some additional ideals or guidance what to check, or what to do.
Don't have the motherboard schematic so kind of running on blind.
What I can check, which paths, or electronic elements ?
For additional info let me know.
Спосибо!