For those having this issue could you recheck your steps for us, so we know it's not something you may have missed:
Raw Materials:
1 Creeper Seed
3 Squid Seeds
3 Lightning Seeds
11 Iron Ingots
2 Nickle Ingot
1 Silver Ingot
1 Gold Ingot
10 Redstone
4 Raw Rubber
2 Sand
Machines:
Pressure Chamber* - (PneCr)
UV Light* - (PneCr)
Smeltery w/ casting table containing an ingot cast (TiCon)
Crafting Bench (vanilla)
Furance (vanilla)
*: Will need a compressed air supply
Step 1 - Unassembled PCB board
Place the Creeper Seeds into the Pressure Chamber to make a Green Plastic
Place 1 Iron Ingot into the Pressure Chamber to make 1 Compressed Iron Ingot
Place the Green Plastic and the Compressed Iron Ingot into the Pressure Chamber to make an Empty PCB
Place the Empty PCB into the UV Light and allow it to etch to 100% to make an Unassembled PCB
Step 2 - Printed Circuit Board
Place 6 Iron Ingots into the Pressure Chamber to get 6 Compressed Iron Ingots
Place the 3 Squid Seeds into the Pressure Chamber to get 3) Black Plastic
Place the 3 Black Plastic, 3 Compressed Iron Ingots, and 3 redstone dust into the Pressure Chamber to get 3 transistors
Place the 3 Lightning Seeds into the Pressure Chamber to get 3 Cyan Plastic
Place the 3 Cyan Plastic, 3 Compressed Iron Ingots, and 3 redstone dust into the Pressure Chamber to get 3 Capacitors
Using the Craft Bench combine the Unassembled PCB, transistors, and capacitors to get a Printed Circuit Board.
With Printed Circuit Board in your inventory, check the quest book to make sure it updated
Step 3 - PCR-100
Cook the 4 Raw Rubber in the furnace to get 4 Rubber Bars
Cook the 4 Rubber Bars in a furnace to get 4 Raw Plastic
Using the Craft Bench, combine the 4 Raw Plastic to get 4 Plastic Sheets
Using the crafting bench, combine the Printed Circuit Board, 4 Plastic Sheets, and 4 Redstone to get the PCR-100
With PCR-100 in your inventory, check the quest book to make sure it updated
Step 4 - Machine Frame
Cook the 2 sand into glass
Place the gold ingot, the silver ingot, 4 iron ingots and 2 nickle(ferrous) metal ingots into the smeltery until all is melted down. Giving you 244mb(2 ingots) of Electrum, and 864mb(6 ingots) of Invar
Using a casting table, cast the metals stored in the smeltery into ingots resulting in 2 Electrum ingots and 6 Invar ingots.
Using the crafting bench, combine the Electrum, 4 Invar, 2 Glass, and PCR-100 to get a Machine Frame
With Machine Frame in your inventory, check the quest book.