loudnproud59

It could be a loose connection where the lcd plugs in to the mainboard or your lcd back light could have a loose connection or the inverter is failing you woud have to dismantle the lcd to be sure,there is no service manual for this laptop so you can use the inspiron 1200 or 2200 manuals they are simular in design this laptop is considered a throw away if it can not be repaired,ebay is the only place to find used parts,hope this helps let us know how it goes