color classic grey screen

[falen6]

Hi folks.

Got a color classic recently - powered it on and it chimed and gave the display of the flashing disk icon
the logic board was in a terrible state - amazed it even chimed.

recapped the board with tants and gave the board a much needed clean

put it back in and powered it on - chimed and display

took out the logic board and re inserted it a few times and the hard drive was working , booted all the way to desktop

powered it on later on and all i get is a grey screen ..BUT the machine boots to the desktop and plays some sound (same sound it played when it got to the desktop when the display worked)

so i have a CC thats working but the display is grey

i thought it would be the memory chips , but if that was the case then the machine would not continue with the boot

have not opened up the machine to even look at the analog board

am i just unlucky that after the recap initally worked , the analog board decided to act up !!

 

[falen6]

have read that the 256k vram is the 2 chips next to the vram expansion slot - ive checked and reflowed them - still the same - i guess this is why the machine is booting regardless of the video problem

took the back cover off to have a look - machine is very clean inside - checked the big slot connector for the logic board and it appears solid and clean

i have replaced every cap one by one from the recap just in case one was bad , but still the same

machine is responding to keyboard commands to shut down , to restart

its just a video issue

volume and brightness controls on the front all working

the machine came with no ram or vram expansion simms

have gone over every solder connection with powerful magnafying glass......... cant see whats the problem is

the board is spotless now , front and back

 

[falen6]

got a display with pram reset , by pressing command , option , P,R and power at the same time ........ but with artifacts on the display as the mouse moves


i dont have a battery installed on logic board as i dont have a new one..........

machine powers with no battery installed - have read many conflicting opinions with batteries on CC