How to Open .TVW Boardview Files

.TVW files are some of the most detailed boardviews you can get: many carry several copper layers, complete net names and test pad data. They are also the format most likely to defeat a beginner, because the free viewer most people start with does not open them. Here is how to open TVW files reliably and make use of what is inside.

What a TVW file is

TVW is the file format of Tebo-ICT View, a viewer from the in-circuit test world. Boards are exported to TVW for test fixtures and service work, and the format can hold more than a typical boardview:

• component outlines, pins and nets, like every boardview;
• often several layers of the PCB, so you can see more of how nets are routed;
• test pads and probe positions used by the test fixture;
• descriptive net names exactly as in the design.

In our catalog, TVW files appear mostly for Gigabyte desktop motherboards and for recent LCFC (Lenovo) laptop boards, with some MSI and other brands as well. You can browse them on the .TVW boardview list.

Which viewers open TVW

Support details change between versions. If you already own FlexBV, start there; the comparison in FlexBV vs OpenBoardView vs Other Viewers: Which to Use explains the trade-offs between the main viewers.

Opening a TVW file step by step

1. Unpack the archive fully. TVW files are often large; make sure the archive extracted without errors.
2. Keep the folder path simple. Very long paths with unusual characters occasionally confuse older viewers.
3. Open the file in FlexBV (or the TVW viewer) from the file menu.
4. Wait for it to load. Layered TVW files take longer to open than simple boardviews.
5. Set the view. Choose top or bottom side, rotate to match your board and hide layers you do not need.

If the file loads but looks wrong — parts outside the board outline, missing pins — the export may be partial. Check whether the board page lists another format for the same board.

Using layers without getting lost

Layered TVW files show more than you need most of the time. A practical routine:

1. Start with the component layers only (top and bottom). That is what you need for finding parts.
2. Turn on inner copper layers only when tracing a damaged connection, for example after corrosion ate through a via or a trace near a connector.
3. Use net highlighting before layers. Highlighting a net shows every pad on it; switching on a layer then shows how it gets there.
4. Return to the simple view when you are done, so the next search is not cluttered.

When TVW is the only boardview

Some boards — especially recent Lenovo designs — may have only a TVW file. In that case:

• install a viewer that opens it rather than hunting for another format that may not exist;
• combine it with the schematic as usual — net names in TVW files usually match the schematic exactly, which makes cross-referencing easy;
• keep the original file; conversion tools exist but tend to drop the layer data that makes TVW valuable.

When TVW will not open

1. Confirm the file is complete. Compare the size with other copies or other boards of the same type; a much smaller file is often truncated.
2. Try another viewer that supports TVW. Variants exist; one tool may handle a file the other does not.
3. Check for encryption or packaging. Some archives contain a renamed file or a password-protected inner archive. A text editor shows whether you have binary data or something else.
4. Look for another format. Many boards in the catalog also have a .CAD, .BDV or .BRD file.

General troubleshooting for every format is in Boardview File Won't Open: Common Errors and Fixes.

Matching a TVW file to your board

Gigabyte desktop boards print the model and revision on the PCB (GA-H270M-D3H REV 1.0), and the TVW file name usually carries the same revision. LCFC boards carry an NM- code with a revision, and TVW files for them often include that code. Always compare:

• the revision in the file name with the revision on the board;
• the board outline and connector positions;
• the position of a few large parts — CPU socket, chipset, memory slots, VRM inductors.

On desktop boards in particular, revisions can move entire VRM sections, so do not skip this check. The general approach is in How to Match a Boardview to Your Board Revision.

Example: a corroded via near a connector

A desktop board has a USB header that stopped working after a drink was spilled into the case. You can see corrosion around a few vias next to the header, but the header pins themselves look clean.

1. In the TVW file, click the header's data pins and note their nets.
2. With only the component layers visible, the nets lead to a pair of small resistors and an ESD diode, then disappear into vias.
3. Switch on the inner layers. The nets continue on an inner layer towards the chipset, passing through two of the vias you saw were corroded.
4. Measure continuity from the header pin to the resistor on the far side of the vias. One line is open.
5. Clean the area, confirm which via failed, and run a thin jumper wire between the two nearest exposed pads on that net.

Without layer data you could still find the open line, but you would be guessing where it breaks. The layers turn a guess into a plan.

Getting the most out of TVW data

• Use the test pads. TVW files from test fixtures mark the pads the fixture used. They are designed to be probed and are usually on the bottom side.
• Trust the net names. Because TVW files often come straight from the design, net names are complete and consistent with the schematic.
• Look at routing when repairing traces. With inner layers visible, you can often see where a damaged trace goes and pick a sensible point for a jumper wire.
• Record findings. If your viewer supports annotations, mark the faults you found; boards of the same model tend to fail the same way.

FAQ

Why can't OpenBoardView open my TVW file?

TVW is not among the formats OpenBoardView generally supports. Use FlexBV or the TVW viewer for these files, and keep OpenBoardView for the other formats.

Are TVW files bigger than other boardviews?

Often, yes, because many contain several layers and more detail. A few megabytes to tens of megabytes is normal.

Can I convert TVW to BRD or BDV?

Some tools can export to simpler formats, but layer data and some details are usually lost. If your viewer opens TVW, keep using the original.

Do TVW files include component values?

Some do, many do not. Take values from the schematic whenever you need to replace a part, and check the marking on the old part if it is still readable.

Bottom line

Open TVW files in FlexBV or the dedicated TVW viewer, not in OpenBoardView. Start with the component layers, use net highlighting, switch on inner layers only when you need to follow routing, and match the board revision before you trust a part position.