Hi everyone,I've had a long battle with a dv9000 Quanta AT5 which had a ticking sound and will not power on. After changing almost all power ICs,KBC, and southbridge, the ticking sound stopped and the board powers up but no display and the the southbridge heats up.I will like to know what the post error code 28 mean [picture attached].Thanks in advance.

Phoenix 28-Autosize DRAM

Thanks and can you give me any idea where I should look?

I have to add that I swapped out the KBC from the DV9000 Quanta AT5 [ENE KB3926 Bx] for DV5 Quanta QT6 [ENE KB3926 C0] could that be a problem?.

KBC is best to install the same revision
Regarding the post code - check RAM, communication RAM slots and North Bridge

Thanks will check and post results.

Hi, after changing the KBC to the same revision I now get error code 98.
I want to know what this code is associated with. I must add that I have reprogrammed the bios but still the same code.

98h Search for option ROMs. One long, two short beeps on checksum failure

Thanks. So what hardware do I check?

Connect LCD, check for image.

Unfortunately there is no image.

After reballing GPU I get this [picture provided] and error code 98 and sometimes error code DA. I want to know whether the GPU is damaged or whether something else need checking. Thanks in advance.

Try to resolder the video memory, if that does not work, use a new GPU.