Black screen while starting and shuts down immediately no sound

Hello,

recently I took apart my pcg-91111m for cleaning and when put back together I had the same problem.

After taking it apart 3 times to check if I forgot/damaged something I found out that my top RAM slot was malfunctioning although I didn't remove/touch these in the 1st place (which I actually should have before cleaning..).

I found that I had to test each slot seperatly with each RAM card individually.

If this is your problem I recommend buying a single 4gb or 8gb RAM card for the working slot and keeping the defective one empty (since you won't be running much with your 2gb cards..).

I put in a 4gb and this has worked well for me although had I given it more time I would've bought an 8gb.

Also I believe the pcg-91111m motherboard doesn't support more then 8gb RAM so don't bother with a 16gb card (they're also really expensive..).

I found that 4gb cards go for about 20 dollars each and 8gb around 30 each.

Hope this helped, and good luck.

regards,

Roald

same problems here on two different computers - actual problem was memory controller on motherboard on first computer and second computer one cheapo memory socket was bad. Sony had a recall on some models with defective memory controllers but Sony limited the recall to a few of their models - and of course they didn't cover all the ones with affected memory controllers, only the models popular with commercial/business customers.

Hello, on start My Sony vaio vpcec1m1e get on and off right away then get on and off continuously

I've the same disfonction on my Sony vaio vpcec1m1e. It begin like this, when I put it on, it get off then get on and start working. A feew moment later, when I put it on, it get off then get on and off continuously wth black screen.

I have exactly the same problem for a few days, before it worked perfectly. Vaio VPCF11M1E turns on and exactly 10 seconds later turns off, I tried removing battery hardisk ram and any other test, the problem persists.