I have a emty slot an i have no vidio an i beleave that the vidio card is gone .but i cant find a service manual to see what goes there.it is a viewsonic pc tablet v1100 got it at pawn shop .the ram is there an the lights all work an no i dont think its sleeping i have tryed wakeing it up that dont work either

It sounds to me like the internal memory petition has gone bad. When this happens it will retain no changes and boots up like it was when new every time it's turned off. Any changes are only retained if you put it to sleep and keep it charged. If the memory partition for apps has gone bad it will no longer be able to download or update apps from the Store and you will be stuck with the original apps and that is all unless you can managed to download some apps to an external SD card in the slot (if it has one).

You can tell if your memory partition has gone bad by using
Settings > Storage and observe the top bar graph. if it's green all the way across and shows 0.00 bytes of storage then the internal SD card memory partition is gone or the memory is defective.

Even so, you should still be able to synch using Google to do so. But, never turn it off again or you will be back to square one again and will have to do everything over and over and over.

I have a Nobis NBO9 that has this same problem. They fixed it once but it went bad again two weeks later. And, they balked at fixing it a second time so I got ripped off. I suspect there is a lot of defective internal SD memory cards in circulation from the reports I see as I research these failures.

The card reader slot is shorter than the memory card itself, so it sounds like you didn't put the SD card into the card reader but rather, into some other kind of slot. If you cannot see the card at all, try straightening a wire such as a large paperclip or something and try using a flashlight so you can see to try and fish the SD card out. If you can't do it, you will have to go to the local computer store for them to try for you.

I don't think your tablet has a slot to add a memory card. Please check the user's manual; I might be wrong. If you can install a memory card in it, the user's manual will show where the memory card slot is located and how to install the card.

Look in Settings/Storage/SD Card and see if you have a Mount option when you insert the card. Make sure the card has gone all the way into the slot and has clicked into place. Make sure the size of the SD card you are inserting is supported by your tablet. (Check the specs in the full manual) If the SD card is larger than what is supported, it may not register with the operating system. Try formatting the SD card on a PC with a card reader and then inserting it into your tablet. (Use FAT32 format).Try another formatted SD card and see if it is recognized by the tablet.

Hi
I haven't had much luck with finding a manual for this machine to tell you precisely where a SIM card would go, but on the specifications toward the bottom of this page:
iRulu 7 WCDMA 3G Black Tablet PC Dual Core Cam 4GB Android 4 2 Bluetooth...
it quite clearly shows it as a dual SIM machine. This may mean that you have the SIM in the wrong slot, or yoou may need 2 to make it operate. Not having found a manual I' m afraid I can't be more specific.
Cheers

With the flickering you stated I would bet that your video card or inverter has gone out or going out.

should be a slot on the side of your tablet. what brand and model tablet do you have?

Here is the manual
Support Manuals
The TF card slot is under the cover at the top near the camera.