flashed wrong rom on tablet and stuck in blue screen with no recovery screen

CPU: Allwinner A31S, Quad Core ARMv7 Processor (VFPv4, NEON) GPU: PowerVR SGX 544MP MotherBoard: INGENIC-CROSS Q8S-v1.0 2013-04-22 Version of Android: 4.2.2 Build Number: fiber_q8s-eng 4.2.2 JDQ39 20130723 test-keys

nothing is coming on the screen just blue screen please help